Technical Information

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Rev. 6, November 2005

Selection Guide
Introduction
Viton® fluoroelastomer was introduced in 1957 to meet the needs of the aerospace industry for a
high-performance seal elastomer. Since then, the use of Viton® fluoroelastomer has expanded to
many other industries, especially in the automotive, fluid power, appliance, and chemical fields. With
over 40 years of proven performance, Viton® fluoroelastomer has developed a reputation for
outstanding performance in high temperature and extremely corrosive environments.

Valuable Properties of Viton® Fluoroelastomer

Vulcanizates based on Viton® provide an exceptional balance of physical property characteristics,
including the following features:
• Resistance to temperature extremes:
Heat—Compared to most other elastomers, Viton® is better able to withstands high
temperature, while simultaneously retaining its good mechanical properties. Oil and chemical
resistance are also essentially unaffected by elevated temperatures. Compounds of Viton® remain
substantially elastic substantially indefinitely when exposed to laboratory air oven aging up to 204°C
or to intermittent exposures up to 316°C. High temperature service limits are generally considered to
be:
3,000 hr at 232°C
1,000 hr at 260°C
240 hr at 288°C
48 hr at 316°C
Cold—Viton® is generally serviceable in dynamic applications to temperatures of –18 to –
23°C. Special formulations permit its use in static applications down to –54°C. Also, Viton® has
proven to be satisfactory for static seals used under conditions approaching absolute zero. Viton® is
characterized by its;
• Resistance to degradation by a greater variety of fluids and chemicals than any
nonfluorinated elastomer. Excellent resistance to oils, fuels, lubricants, and most mineral acids.
• Extremely low permeability to a broad range of substances, including particularly good
performance in oxygenated automotive fuels.
• Resistance to aliphatic, aromatic hydrocarbons that dissolve other rubbers.
• Exceptionally good resistance to compression set, even at high temperatures.
• Exceptionally good resistance to atmospheric oxidation, sun, and weather. Excellent
resistance to fungus and mold.
• Good electrical properties in low voltage, low frequency applications.
• Low burning characteristics; inherently more resistant to burning than other, non-fluorinated
hydrocarbon rubbers.
 2

Safety and Handling

As with many polymers, minute quantities of potentially irritating or harmful gases may diffuse from
uncured Viton® even at room temperature. Therefore, all containers should be opened and used only
in well-ventilated areas. In case of eye contact, immediately flush the eyes for at least 15 min with
water. Always wash contacted skin with soap and water after handling Viton®.
Potential hazards, including the evolution of toxic vapors, may arise during compounding, processing,
and curing of the raw polymers into finished products or under high-temperature service conditions.
Therefore, before handling or processing Viton®, make sure that you read and follow the
recommendations in the DuPont Performance Elastomers bulletin “Handling Precautions for Viton®
and Related Chemicals.”
Compounding ingredients and solvents that are used with Viton® to prepare finished products may
present hazards in handling and use. Before proceeding with any compounding or processing work,
consult and follow label directions and handling precautions from suppliers of all ingredients.

The Various Families and Types of Viton® Fluoroelastomer

Standard types of Viton® fluoroelastomer products are designated as A, B, or F according to their
relative resistance to attack by fluids and chemicals. The differences in fluid resistance are the result
of different levels of fluorine in the polymer, which is determined by the types and relative amounts of
copolymerized monomers that comprise the polymer.
In general, Viton® exhibits outstanding resistance to attack from a wide variety of fluids, including
mineral acids and aliphatic and aromatic hydrocarbons. The higher the fluorine content of the
polymer, the less will be the effect, as measured by volume increase, for example. The most
significant differences between A, B and F types of Viton®, in terms of resistance to volume change
or retention of physical properties, are exhibited in low molecular weight, oxygenated solvents (such
as methanol and methyl t-butyl ether).
As mentioned above, the fluid resistance of Viton® A, B, and F types improves with increasing
fluorine levels. This is shown in Table 1 (note the volume increase after aging in methanol at 23°C).
As the fluorine content increases, however, the low temperature flexibility of the polymer decreases,
and a compromise must be made between fluid resistance and low temperature flexibility of the final
vulcanizate.
For those applications that require the best performance in both fluid resistance and low temperature
flexibility a number of specialty types of Viton® were developed that contain a copolymerized
fluorinated vinyl ether monomer. Polymers that contain this monomer exhibit significantly improved
low temperature flexibility, compared to standard types of fluoroelastomer.
Viton® GLT introduced in 1976, was the first commercial fluoroelastomer to incorporate this
fluorinated vinyl ether monomer. This polymer provides the same excellent resistance to heat and
fluids that is typical of the A types of Viton® fluoroelastomer. Viton® GFLT, like Viton® GLT, exhibits
significantly improved low temperature flex characteristics compared to standard types of
fluoroelastomer. In addition, Viton® GFLT provides the same superior resistance to fluids that is
typical of the F types of Viton® fluoroelastomer.
Types of Viton® Extreme™
Fluoroelastomers that contain copolymerized vinylidene fluoride(VF2) are subject to attack by high pH
materials, including caustics and amines. In addition, standard fluoroelastomers are not resistant to
low molecular weight carbonyl compounds, such as methyl ethyl ketone, acetone, or methyl
tertiarybutyl ether.
Viton® Extreme™ ETP-600S is a copolymer of ethylene, tetrafluoroethylene (TFE), and
perfluoromethylvinyl ether (PMVE). This unique combination of monomers provides outstanding
resistance to fluids and is an example of an ETP polymer. The ETP types of Viton® exhibit the same
excellent resistance to acids and hydrocarbons typical of A, B and F types of Viton®. Unlike
conventional fluoroelastomers, however, ETP types of Viton® also provide excellent resistance to low
molecular weight esters, ketones, and aldehydes. In addition, these unique polymers are inherently
resistant to attack by base, and thus provide excellent resistance to volume swell and property loss in
highly caustic solutions and amines.
Additional information regarding performance differences between the various families and types
of Viton® fluoroelastomer is presented in Tables 3–6 to assist in selecting the particular grade of
 3

Viton® that is best suited for both a given end-use application and for a specific manufacturing
process.

Table 1
Polymer Fluorine Content versus Fluid Resistance and Low Temperature Flexibility
Standard Types Specialty Types
A B F GLT-S GFLT-S ETP-S
Nominal Polymer Fluorine 66 68 70 64 67 67
Content, wt%
Percent Volume Change in Fuel 4 3 2 5 2 4
C, 168 hr at 23°C*
Percent Volume Change in 90 40 5 90 5 5
Methanol, 168 hr at 23°C*
Percent Volume Change in >200 >200 >200 >200 >200 19
Methyl ethyl Ketone, 168 hr at
23°C*
Percent Volume Change in 30% (Samples too swollen and degraded to test) 14
Potassium Hydroxide,
168 hr at 70°C*
Low Temperature Flexibility, TR- -17 -13 -6 -30 -24 -12
10, °C*
*Nominal values, based on results typical of those obtained from testing a standard, 30 phr MT (N990) carbon black-filled, 75 durometer
vulcanizate. These are not intended to serve as specifications.

Curing Systems for Viton® Fluoroelastomer

In addition to inherent differences between the various types and families of Viton® fluoroelastomer, a
number of compounding variables have major effects on the physical property characteristics of the
final vulcanizates. One very important variable is the crosslinking or curing system that is used to
vulcanize the elastomer.
Diamine curatives were introduced in 1957 for crosslinking Viton® A. While these diamine curatives
are relatively slow curing, and do not provide the best possible resistance to compression set, they do
offer unique advantages. For example, compounds cured with diamines exhibit excellent adhesion to
metal inserts and high hot tensile strength.
Most fluoroelastomers are crosslinked with Bisphenol AF, a curative introduced in 1970, in the first
commercial curative-containing precompound, Viton® E-60C. Compounds of Viton® that use this
curative exhibit fast rates of cure and excellent scorch safety and resistance to compression set.
In 1987, an improved bisphenol curative was introduced, which was made available in several
different precompounds. The modified system provides faster cure rates, improved mold release, and
slightly better resistance to compression set, compared to the original bisphenol cure system used in
Viton® E-60C and E-430. Additional precompounds of Viton®, incorporating this modified curative,
were introduced in 1993, including Viton® A-331C, A-361C, B-601C, and B-651C. A brief description
of all these products can be found in Table 6.
In 1976, efficient peroxide curing of fluoroelastomers was made possible for the first time with the
introduction of Viton® GLT. The peroxide cure system provides fast cure rates and excellent physical
properties in polymers such as GLT and GFLT which cannot be readily cured with either diamine or
bisphenol crosslinking systems. In the case of polymers such as Viton® GF, GBL-200, and GBL-900,
the peroxide cure provides enhanced resistance to aggressive automotive lubricating oils and steam
and acids. Generally, vulcanizates of Viton® fluoroelastomers cured with peroxide do not show any
significant difference in resistance to other fluids and chemicals compared to the same polymer cured
with bisphenol.
In 2003, a series of peroxide-cure types of Viton® made with Advanced Polymer Architecture was
introduced. These polymers, designated as APA polymers by having an “S” suffix on the product
name, incorporate a significantly improved cure site. As a result, they provide substantially better
processing and physical properties, compared to the original, non-APA peroxide-cure types of
Viton®. A comparison of the various processing and physical property characteristics of compounds
using the various cure systems is shown in Table 2.
 4

Table 2
A Comparison of Cure Systems Used in Crosslinking Viton®
Type of Cure System
Property, Processing Characteristic Diamine Bisphenol Peroxide*
Processing Safety (Scorch) P-F E E
Fast Cure Rate P-F E E
Mold Release/Mold Fouling P G-E G-E
Adhesion to Metal Inserts E G G
Compression Set Resistance P E E
Steam, Water, Acid Resistance F G E
Flex Fatigue Resistance G G G
Rating: E=Excellent G=Good F=Fair P=Poor
*Luperco 101-XL (trademark of Pennwalt Corporation) and Varox Powder (trademark of R.T. Vanderbilt Co., Inc.) are commonly used.

Selecting a Specific Type of Viton® Fluoroelastomer

Inherent Physical Property Differences Between Types/Families of Viton® Products
The physical properties of vulcanizates based on Viton® fluoroelastomers are determined to a large
extent by the type and amount of the filler(s) and curative(s) used in the formulation, and by the
temperature and duration of the curing cycle used in their manufacture.
In terms of resistance to compression set, low temperature flexibility, and resistance to certain
classes of fluids, however, some inherent differences exist among the various families of Viton®
fluoroelastomers. These are the result of differences in the relative amount and type of monomers
used in the manufacture of the various types of Viton® fluoroelastomers.
The differences in physical property characteristics which exist between various types and families of
Viton® fluoroelastomer products are outlined in general terms in Table 3.
As an example, resistance to compression set is an important property for seals and if this property
were considered to be the most important feature for a particular part, then one of the A-types of
Viton® might be the best choice for the application. However, if resistance to the widest possible
range of fluids is a more important consideration then an F-type Viton® fluoroelastomer might well be
a better choice for that particular end-use application. Further, if both fluid resistance and low
temperature flexibility are equally important requirements for maximizing the end-use suitability of a
given part GFLT-types of Viton® would represent the best overall choice.
Table 3
Physical Property Differences Between Types/Families of Viton® Products
Type of Viton® Resistance to General Fluids/ Low Temperature
Fluoroelastomer Compression Set Chemical Resistance* Flexibility**
A 1 3 3
B, GBL-S 2 3 3
F, GF-S 3 2 3
GLT-S 2 3 1
GFLT-S 2 2 2
ETP-S 3 1 3
1=Excellent—Best performance capability of all types; 2=Very Good; 3=Good—Sufficient for all typical fluoroelastomer applications
*See Table 4 for a detailed guide to choosing the best type of Viton® fluoroelastomer, relative to specific classes of fluids and chemicals.
**Flexibility, as measured by Temperature of Retraction (TR-10), Gehman Torsional Modulus, Glass Transition (Tg), or Clash-Berg Temperature.
Brittle-Point tests are a measure of impact resistance only and do not correlate at all with the low temperature sealing capability of a vulcanizate.
 5

Selecting a Specific Type of Viton® Fluoroelastomer

Differences in Fluid Resistance Between Types of Viton® Products

As in the case of physical properties, different polymer compositions will result in inherent differences
with regard to fluid resistance.
Table 4 outlines the differences that exist between types of Viton® products, in terms of their
resistance to various classes of fluids and chemicals.
Because as certain types of Viton® products may exhibit performance that is superior to other types
in one regard, but not quite as good in some other aspect, it is important to consider the requirements
of the part to be manufactured, in terms of both physical property requirements and fluid or chemical
resistance needs.
Using Tables 3 and 4, the compounder can select the best type of Viton® product for a given end-use
application, based on the best combination of physical property and fluid resistance characteristics.
Table 4
Differences in Fluid Resistance Between Types of Viton® Fluoroelastomer
Type of Viton® Fluoroelastomer
A B F GBL-S GF-S GLT-S GFLT-S ETP-S
Cure System
Bisphenol Peroxide
Hydrocarbon Automotive, Aviation 1 1 1 1 1 1 1 1
Fuels
Oxygenated Automotive Fuels NR 2 1 2 1 NR 1 1
(containing MeOH, EtOH, MTBE,
etc.)
Reciprocating Engine Lubricating 2 1 1 1 1 1 1 1
Oils (SE-SF Grades)
Reciprocating Engine Lubricating 3 2 2 1 1 1 1 1
Oils (SG-SH Grades)
Aliphatic Hydrocarbon Process 1 1 1 1 1 2 1 1
Fluids, Chemicals
Aromatic Hydrocarbon Process 2 2 1 1 1 2 1 1
Fluids, Chemicals
Aqueous Fluids: Water, Steam, 3 2 2 1 1 1 1 1
Mineral Acids (H2SO4, HNO3, HCl,
etc.)
Amines, High pH Caustics (KOH, NR NR NR 3 3 3 3 1
NaOH, etc.)
Low Molecular Weight Carbonyls NR NR NR NR NR NR NR 1
(MTBE, MEK, MIBK, etc.)
1=Excellent—Best choice of Viton® type(s) for service in this class of fluid/chemical; minimal volume increase, change in physical properties.
2=Very Good—Good serviceability in this class of fluid/chemical; small amounts of volume increase and/or changes in physical properties.
3=Good—Suitable for use in this class of fluid/chemical; acceptable amounts of volume increase and/or changes in physical properties.
NR=Not Recommended—Excessive volume increase or change in physical properties.
 6

Viton® Product Naming System

With the introduction of six improved processing precompounds in 1993, a new nomenclature system
was adopted for Viton® fluoroelastomer products. The new system incorporates the following
information in a product name:
• Nominal Mooney Viscosity
• Family type (relative fluid resistance)
• Relative state of cure (relative level of crosslinking agent present in curative-containing
precompounds)
• An indication of whether the product can be crosslinked using a peroxide cure system
• An indication of whether the product is a gum polymer or a precompound, which contains a
preset, carefully controlled amount of bisphenol crosslinking system.

Each character in the product name indicates a specific characteristic as outlined below:

1st Character (Letter)

• Represents the Viton® fluoroelastomer family--A, B, F, or ETP.

• A “G” prefix, in addition to a family prefix, indicates that the polymer can be crosslinked with the peroxide
cure system.
• An “L” designation indicates that the A, B, or F type polymer provides slightly improved low temperature
flexibility characteristics versus other polymers within the same family. An “LT” designation indicates a
more significant improvement in low temperature performance criteria.
2nd Character (Number)
Represents nominal Mooney Viscosity of the product—ML 1 + 10 at 121°C.
3rd Character (Number)
Represents the relative level of curative in a precompound on a scale of 10 1 (10 is represented by 0);
0 = High curative level (for optimum compression set)
9 2 = Intermediate, decreasing levels of curative (increased elongation at break, tear
resistance)
1 = Low curative level (for optimum tear, flex resistance)
th
4 Character (Number)
Represents a slightly different version of a particular precompound.
5th Character (Letter)

• Absence of a letter suffix indicates that the product is a gum polymer only and contains no curatives
(may contain process aid).
• “C” indicates that the product is a precompound, containing accelerator and curative.
• “S” indicates that the product incorporates Viton® made with Advanced Polymer Architecture technology
 7

Choosing a Viton® Product for Use in a Particular Type of Manufacturing Process

The Viton® product line includes a wide variety of different types of fluoroelastomer products, which
exhibit some inherent differences in their end-use capabilities (see Tables 3 and 4). In addition, a
broad range of viscosities is offered for most types of Viton®, providing a wide degree of utility in
various manufacturing processes.
Having selected a given class of Viton® products for an end use, the compounder must then choose
which particular Viton® product is best suited for use in a specific manufacturing process.
The Viton® - Application Guide (Table 5) lists the Viton® products that are recommended for
particular end-use applications, according to the various processes that are most commonly used in
their manufacture.
The Viton® - Product Listing (Table 6) provides more specific information about the various individual
Viton® products. Contact your DuPont Performance Elastomers sales or technical representative to
obtain more detailed information or data on specific Viton® products.
How to Use the Viton® Application Guide
The Viton® - Application Guide (Table 5) has been designed to facilitate choice of the type of Viton®
that is best suited for meeting both the property requirements of the intended end use and the needs
of the production method used to manufacture the finished product.
The guide is divided into five general categories (columns) of end-use products, differentiated
primarily by physical form:
• Sheet form goods, such as gaskets, diaphragms, etc.
• Simple shapes, such as O-rings, V-rings, etc., which do not typically require high levels of
demolding tear resistance, but which generally require high states of cure to obtain the best
compression set possible.
• Complicated molded shapes, such as shaft seals or valve stem seals, which require good hot
tear upon demolding do to the undercuts in the molds used to form such parts and good adhesion to
metal inserts (obtained during the vulcanization of the parts).
• Complicated molded shapes that do not involve adhesion to metal inserts during
vulcanization, but which require good resistance to tear during demolding. Carburetor roll-over cages,
boots, and reed valves are examples of such parts.
• Extruded shapes, such as rod, tubing, or hose constructions.
Each general end-use category listed is divided into four columns, each listing Viton® products within
a specific family or type of Viton® fluoroelastomer—A, B, F, and specialty types.
The guide is further divided into the five major types of process (rows) by which these general end-
use categories might be produced:
• Compression molding
• Transfer molding
• Injection molding
• Extrusion
• Calendering

Within the blocks formed by the “intersection” of a given end-use category (column) and the process
type by which the end products will be manufactured (row), we have listed the types of Viton® that
we believe are appropriate choices for meeting the physical property requirements of the finished
product and that are best suited for the chosen manufacturing process.
The Viton® products we believe will provide the best combination of end-use physical properties,
together with the best processing characteristics for given methods of manufacture, are listed in bold
type.
Additional details for specific types of Viton® can be found in the Viton® Product Listing and in
product-specific data sheets.
 8

Table 5
Viton® Fluoroelastomer Application Guide

Reinforced/Unreinforced Sheet Stock (Gaskets, Molded (Non-Bonded), Simple Shapes

Manufacturing Diaphragms, etc.) (O-Rings, V-Rings, etc.)
Process
Viton® Types
A B F Specialty A B F Specialty
A-331C B-435C F-605C GLT-600S A-401C B-601C F-605C GLT-600S
A-361C B-601C GF-600S GBLT-600S A-331C B-651C GF-600S GBLT-600S
A-401C B-651C GFLT-600S A-601C GBL- GFLT-600S
Compression
A-601C GBL-600S ETP-600S A-500 600S ETP-600S
Molding
A-500 B-600 A-HV B-600
A-700 A-700
AL-600 AL-600
A-201C B-435C F-605C GLT-200S A-201C B-651C F-605C GLT-200S
A-331C GBL-200S GF-200S GBLT-200S A-331C GBL- GF-200S GBLT-200S
Transfer A-361C B-202 GFLT-200S A-361C 200S GFLT-200S
Molding A-401C ETP-600S A-200 B-202 ETP-600S
A-200 AL-300
AL-300
A-201C B-435C GF-200S GLT-200S A-201C B-601C F-605C GLT-200S
A-331C GBL-200S GBLT-200S A-331C B-651C GF-200S GBLT-200S
A-361C B-202 GFLT-200S A-361C GBL- GFLT-200S
Injection
A-200 A-100 200S ETP-600S
Molding
AL-300 A-200 B-202
A-500
AL-300

A-201C B-435C F-605C GLT-200S

A-401C B-601C GF-200S GLT-600S
A-331C B-651C GF-600S GBLT-200S
Calendering A-361C GBL-200S GBLT-600S
AL-300 GBL-600S GFLT-200S
B-202 GFLT-600S
B-600 ETP-600S

Molded (Bonded), Complicated Shapes (Valve Molded (Non-Bonded), Complicated Shapes

Stem, Shaft Seals, etc.) (Boots, Valves, etc.)
A-361C B-435C F- GLT-200S A-331C B-435C F- GLT-600S
A-500 B-651C 605C/GF- GLT-600S A-401C/A- B-651C 605C/GF- GBLT-600S
A-700 GBL-600S 200S GBLT-200S 500 GBL-600S 600S GFLT-600S
AHV B-600 GF-200S GBLT-600S A-601C/A- B-600 GF-600S ETP-600S
Compression
AL-600 GF-600S GFLT-200S 200
Molding
GFLT-600S A-361C
ETP-600S A-700
AHV
AL-600
A-361C B-435C GF-200S GLT-200S A-200 B-435C F-605C/ GLT-200S
A-200 GBL-200S GBLT-200S A-331C B-651C GF-200S GBLT-200S
Transfer A-500 B-202 GFLT-200S A-361C GBL- GF-300 GFLT-200S
Molding AL-300 ETP-600S A-200 200S ETP-600S
A-500 B-600
AL-300

A-361C B-435C F-605C/ GLT-200S A-200 B-435C F-605C/ GLT-200S

A-100 B-651C GF-200S GBLT-200S A-331C B-651C GF-200S GBLT-200S
Injection A-200 GBL-200S GF-200S GFLT-200S A-361C GBL- GF-200S GFLT-200S
Molding A-500 B-202 A-200 200S
AL-300 A-500 B-202
AL-300
 9

Table 5
Viton® Fluoroelastomer Application Guide (cont’d.)

Manufacturing Extruded Goods (Hose, Tubing, Extruded Profiles, etc.)

Process Viton® Types
A B F Specialty
A-201C B-435C F-605C GLT-200S
A-401C B-651C GF-200S GBLT-200S
Extrusion A-361C GBL-200S GFLT-200S
A-200 B-202 ETP-600S
A-500 B-600
AL-300

Table 6
Viton® Fluoroelastomer Product Listing
Polymer Properties Nominal Physical Properties*
Viton®
Volume Fluoroelastomer
Nominal Polymer Temperature Increase, Viton® Product
Viton® Viscosity, Fluorine Compression of After Fluoroelastomer Suggested
Product ML1 + 10 Specific Content, Set, % Retraction 7 days/ Product Uses/
Type at 121°C Gravity % 70 hr/200°C (TR-10) °C MeOH/23°C Description Applications

A-Types: Curative-Containing Precompounds

Fast cure rate,
FDA-compliant**:
excellent
+75 to injection molding,
A-201C 20 1.81 66.0 15 -17 injection molding
105% O-rings, gaskets,
rheology, mold
extruded shapes
release
Compression—
Excellent mold injection molding
+75 to flow, high of complex
A-331C 30 1.81 66.0 20 -17
105% elongation/tear shapes, requiring
resistance maximum hot
tear
Excellent mold Compression—
flow, tear injection molding
+75 to
A-361C 30 1.81 66.0 20 -17 resistance, of complex
105%
bonding to metal shapes, bonded
inserts metal inserts
Excellent
FDA-compliant**:
rheology at high
compression,
+75 to shear rates,
A-401C 40 1.81 66.0 15 -17 transfer, or
105% excellent
injection molding
resistance to
of O-rings
compression set

High viscosity, FDA-compliant**:

high state of compression
+75 to
A-601C 60 1.81 66.0 12 -17 cure; optimum molding of O-
105%
resistance to rings, simple
compression set shapes

*Nominal physical properties typical of those that can be expected of vulcanizates based on the specific type of Viton® noted, in a 70A hardness,
MT carbon black-filled formulation. These are not intended to serve as specifications.
**Curative-containing precompounds, and polymers + VC-50 (at levels less than or equal to 2.50 phr rubber) have been determined to be in
compliance with FDA 21 CFR-177.2600—Rubber Articles for Repeated Food Contact.
 10

Table 6
Viton® Fluoroelastomer Product Listing (cont’d.)
Polymer Properties Nominal Physical Properties*
Viton®
Volume Fluoroelastomer
Nominal Polymer Temperature Increase, Viton® Product
Viton® Viscosity, Fluorine Compression of After Fluoroelastomer Suggested
Product ML1 + 10 Specific Content, Set, % Retraction 7 days/ Product Uses/
Type at 121°C Gravity % 70 hr/200°C (TR-10) °C MeOH/23°C Description Applications

A-Types: Gum Polymers

Ultra-low Coatings,
+75 to viscosity: viscosity modifier
A-100 10 1.82 66.0 15 -17
105% excellent polymer for higher
rheology viscosity types

FDA-compliant**,
Low viscosity:
+75 to cured w. VC-50:
A-200 20 1.82 66.0 15 -17 excellent polymer
105% injection molding
rheology
applications

FDA-compliant**,
Intermediate
cured w. VC-50:
+75 to viscosity:
A-500 50 1.82 66.0 15 -17 compression,
105% excellent polymer
transfer, injection
rheology
molding

FDA-compliant**,
High viscosity: cured w. VC-50:
+75 to
A-700 70 1.82 66.0 15 -17 excellent physical compression,
105%
properties transfer, injection
molding

FDA-compliant**,
Ultra-high cured w. VC-50:
+75 to viscosity: compression
A-HV 160 1.82 66.0 15 -17
105% excellent physical molding, high
properties strength
vulcanizates

Transfer, or
injection molded
Slightly improved
goods, where A-
+75 to low temperature
AL-300 30 1.77 66.0 25 -19 types are
105% flexibility. Low
marginal in low-
viscosity
temperature
flexibility

General molded
Slightly improved goods, where A-
+75 to low temperature types are
AL-600 60 1.77 66.0 20 -19
105% flexibility. marginal in low-
Medium viscosity temperature
flexibility
*Nominal physical properties typical of those that can be expected of vulcanizates based on the specific type of Viton® noted, in a 70A hardness,
MT carbon black-filled formulation. These are not intended to serve as specifications.
**Various types of Viton® curative-containing precompounds have been determined to be in compliance with FDA 21 CFR-177.2600—Rubber
Articles for Repeated Food Contact.
 11

Table 6
Viton® Fluoroelastomer Product Listing (cont’d.)
Polymer Properties Nominal Physical Properties*
Viton®
Volume Fluoroelastomer
Nominal Polymer Temperature Increase, Viton® Product
Viton® Viscosity, Fluorine Compression of After Fluoroelastomer Suggested
Product ML1 + 10 Specific Content, Set, % Retraction 7 days/ Product Uses/
Type at 121°C Gravity % 70 hr/200°C (TR-10) °C MeOH/23°C Description Applications

B-Types: Curative-Containing Precompounds

Improved
Injection—
processing/mold
compression
B-435C 40 1.85 68.5 25 -14 +35 to 45% release/bonding
molding of metal-
vs. B-641C, B-
bonded parts
651C

FDA-compliant**:
Excellent balance
compression –
of resistance to
B-601C 60 1.85 68.5 20 -14 +35 to 45% injection molding
compression
of O-rings, simple
set/fluids
shapes

Excellent mold Compression –

flow, very good injection molding
B-651C 60 1.85 68.5 30 -14 +35 to 45% tear resistance, of complex
bonding to metal shapes, bonded
inserts metal inserts
B-Types: Gum Polymers
FDA Compliant**
Excellent Transfer –
resistance to compression
GBL-
20-30 1.85 67.0 30 -16 +40 to 50% automotive molding auto
200S
lubricating oils, lubricating oil,
aqueous fluids coolant system
seals
FDA Compliant**
Excellent Compression
resistance to molding
GBL-
65 1.85 67.0 30 -16 +40 to 50% automotive automotive
600S
lubricating oils, lubricating oil,
aqueous fluids coolant system
seals

FDA-compliant**:
Excellent
high shear
extrudability;
extrusion
B-202 20 1.86 68.5 25 -14 +35 to 45% lower MeOH
applications—
permeability than
fuel hose veneer,
A-types
coatings

Intermediate
viscosity, FDA-compliant**:
excellent polymer compression,
B-600 60 1.86 68.5 20 -14 +35 to 45%
rheology, transfer, and
superior fluids injection molding
resistance
*Nominal physical properties typical of those that can be expected of vulcanizates based on the specific type of Viton® noted, in a 70A hardness,
MT carbon black-filled formulation. These are not intended to serve as specifications.
**Various types of Viton® curative-containing precompounds have been determined to be in compliance with FDA 21 CFR-177.2600—Rubber
Articles for Repeated Food Contact.
 12

Table 6
Viton® Fluoroelastomer Product Listing (cont’d.)
Polymer Properties Nominal Physical Properties*
Viton®
Volume Fluoroelastomer
Nominal Polymer Temperature Increase, Viton® Product
Viton® Viscosity, Fluorine Compression of After Fluoroelastomer Suggested
Product ML1 + 10 Specific Content, Set, % Retraction 7 days/ Product Uses/
Type at 121°C Gravity % 70 hr/200°C (TR-10) °C MeOH/23°C Description Applications

F-Types: Curative-Containing Precompounds

Improved
FDA-compliant**:
polymer base vs.
compression
F-601C—
F-605C 60 1.90 69.5 30 -8 +5 to 10% molded goods
improved
requiring best
rheology,
fluids resistance
compression set
F-Types: Gum Polymers

FDA-compliant**:
Injection transfer,
Low viscosity
GF- or compression
25-30 1.91 70.0 35 -6 +3 to 5% version of GF-
200S molded goods
600S
requiring best
fluids resistance

Superior
FDA-compliant**:
resistance to
Compression
GF- broad range of
65 1.91 70.0 35 -6 +3 to 5% molded goods
600S fluids and
requiring best
chemicals,
fluids resistance
including MeOH
Low-Temperature Types of Viton® Polymer
GLT Types
FDA Compliant**
Injection –
20-30 Mooney GLT:
transfer molded
+75 to best FKM low-
GLT-200S 25-30 1.78 64.0 30 -30 automotive fuel,
105% temperature
chemical,
flexibility
petroleum
industry seals
FDA Compliant**
Transfer –
compression
+75 to Medium viscosity molded
GLT-600s 65 1.78 64.0 35 -30
105% version of GLT automotive fuel,
chemical,
petroleum
industry seals
GBLT Types
Low-temperature Fuel systems
flexibility/fluid parts: resistance
resistance to low
GBLT-200S 25-30 1.80 65.0 40 -26 +65 to 90%
intermediate oxygenates, low-
between GLT/GFLT temperature
types flexibility
Low-temperature Fuel systems
flexibility/fluid parts: resistance
resistance to low
GBLT-600S 65 1.80 65.0 35 -26 +65 to 90%
intermediate oxygenates, low-
between GLT/GFLT temperature
types flexibility
*Nominal physical properties typical of those that can be expected of vulcanizates based on the specific type of Viton® noted, in a 70A hardness,
MT carbon black-filled formulation. These are not intended to serve as specifications.
**Various types of Viton® curative-containing precompounds have been determined to be in compliance with FDA 21 CFR-177.2600—Rubber
Articles for Repeated Food Contact.
 13

Table 6
Viton® Fluoroelastomer Product Listing (cont’d.)
Polymer Properties Nominal Physical Properties*
Volume Viton®
Nominal Polymer Increase, Viton® Fluoroelastomer
Viton® Viscosity, Fluorine Compression Temperature After Fluoroelastomer Product
Product ML1 + 10 Specific Content, Set, % of Retraction 7 days/ Product Suggested Uses/
Type at 121°C Gravity % 70 hr/200°C (TR-10) °C MeOH/23°C Description Applications

GFLT Types
Bonded fuel
30 ML GFLT: best
systems parts:
combination of low-
resistance to
GFLT-200S 25-30 1.86 66.5 35 -24 +5 to 10% temperature
oxygenates, low-
flexibility/fluids
temperature
resistance
flexibility
Bonded fuel
65 ML GFLT: best
systems parts:
combination of low-
resistance to
GFLT-600S 65 1.86 66.5 40 -24 +5 to 10% temperature
oxygenates, low-
flexibility/fluids
temperature
resistance
flexibility
Viton® Extreme™ Types
Outstanding
resistance to FDA-compliant**:
fluids/chemicals, Transfer –
ETP-600S 60 1.82 67.0 40 -12 +10 to 15% including low compression
molecular weight molded seals,
acids, aldehydes, gaskets
ketones
*Nominal physical properties typical of those that can be expected of vulcanizates based on the specific type of Viton® noted, in a 70A hardness,
MT carbon black-filled formulation. These are not intended to serve as specifications.
**Various types of Viton® curative-containing precompounds have been determined to be in compliance with FDA 21 CFR-177.2600—Rubber
Articles for Repeated Food Contact.
 14

Applications
Automotive
Parts produced from Viton® fluoroelastomer are widely used in the automotive industry because of
their outstanding heat and fluid resistance. They are used in the following areas:

Powertrain Systems
• Crankshaft seals, Valve stem seals, Transmission seals
• Air Intake Manifold gaskets

Fuel Systems
• Veneered fuel hose
• In-tank fuel hose and tubing
• Pump seals, Diaphragms and Injector O-rings
• Accelerator pump cups
• Filter caps and filter seals
• Fuel sender seals, Carburetor needle tips

Appliances
The heat and fluid resistance of Viton® fluoroelastomer, coupled with its good mechanical strength,
makes it a natural choice for many appliance parts. The use of seals and gaskets of Viton® has
resulted in design of appliances in challenging environments. Here are some typical success stories:
• In one commercial automatic dry cleaning machine, no less than 107 components are made of
Viton®: door seals, sleeve-type duct couplings, shaft seals, O-rings, and various static gaskets.
They perform in an atmosphere of perchloroethylene fumes at temperatures up to 88°C,
conditions that would quickly degrade other elastomers.
• A fluid-activated diaphragm-type thermostat for gas or electric ranges owes its success to the
designer’s choice of Viton® for the actuator element. Because Viton® adheres well to brass is
virtually impermeable to and is not swelled or deteriorated by the fluids used, can withstand
operating temperatures of 149 to 204°C, and has the mechanical strength to resist repeated
flexing.

Chemical Industry
Viton® fluoroelastomer is essentially a universal seal for chemical process equipment. Its application
in the chemical industry is illustrated by the following examples:
• In a pumping station that handles more than 80 different solvents, oils, and chemicals, seals of
Viton® are used in the piping’s swivel and telescoping joints. When these joints were inspected
after two years’ service, they were found to be as good as new.
• Valves lined with Viton® reduce heat and corrosion worries in many plants.
• Hose made of Viton® transfers solvents and reactive petrochemicals to and from processing
and distribution facilities. There are installations on ocean tankers as well as on highway trailers.
• Processing rolls for hot or corrosive service are covered with Viton®.
• Flange gaskets for glass-bodied valves in a paper bleaching plant are of Viton®.
• Viton® replaced caulking on a process equipment enclosure, previously plagued with
hot solvent leaks, and saved $4,000 per year in maintenance costs.
• Aerosol-propelled solvent solutions of Viton® are sprayed on chemical process equipment as
multi-purpose maintenance coatings.
 15

Industrial Use
The good mechanical properties of Viton® fluoroelastomer have permitted it to replace conventional
elastomers in a range of applications that cut across industry lines. To cite a few:
• Stable-dimensioned O-rings in the meters of automatic gasoline blending pumps
• High vacuum seals for the world’s most powerful proton accelerator
• Heat- and corrosion-resistant expansion joints for a utility company’s stack gas exhaust ducts
• Tubing and seals for a variety of top-quality industrial instruments
• Compression pads for heavy-duty vibration mounts used for portable missile ground control
apparatus
• Conveyor rolls for a solvent cleaning machine
• Packing rings for hydraulic activators on steel mill ladles
• Clamp cushions for parts dipped in 285°C solder
• Jacketing for steel mill signal cable
• Deflector rolls on high-speed tinplating lines
• Precision-molded balls for check valves in oil or chemical service
• O-ring seals for test equipment in an automotive manufacturer’s experimental lab

Aerospace
Reliability of materials under extreme exposure conditions is a prime requisite in this field. Aircraft designers
report that O-rings of Viton® fluoroelastomer have a useful thermal range of –54 to 316°C and that Viton®
exhibits “long and consistent life,” even at the upper end of this range. Higher temperatures can be tolerated for
short periods. Viton® also resists the effects of thermal cycling, encountered in rapid ascent to and descent from
the stratosphere. Other desirable characteristics of Viton® that are pertinent to aerospace applications are its
excellent abrasion resistance and its ability to seal against “hard” vacuum, as low as 10–9 mm Hg (133 nPa),
absolute.
The high-performance properties of Viton® have been demonstrated in these typical aircraft and missile
components:
• O-rings and Manifold gaskets
• Coated fabric covers for jet engine exhausts between flights
• Firewall seals
• Abrasion-resistant solution coating over braid-sheathed ignition cable
• Clips for jet engine wiring harnesses
• Tire valve stem seals
• Siphon hose for hot engine lubricants

Fluid Power
Designers and engineers are discovering that seals of Viton® fluoroelastomer work better and last longer than
any other rubber in most fluid power applications. Viton® seals effectively up to 204°C and is unaffected by most
hydraulic fluids, including the fire-resistant types. Seals of Viton® can also cut maintenance costs under more
moderate service conditions (below 121°C) by providing longer, uninterrupted seal reliability.
Some applications in which seals of Viton® can reduce fluid loss and minimize downtime include the following:
• Actuators are the hydraulic components most likely to develop small, steady leaks when rubber seals wear
and lose resilience, which can be extremely expensive. In a working year, day-to-day leakage from the
average hydraulic system wastes enough fluid to completely fill the system more than four times. Viton®
prevents or reduces leakage by maintaining its toughness and resilience longer than other rubber seal
materials under normal fluid power conditions.
• In pumps, poor sealing performance increases operating costs by wasting power. When internal seals lose
resilience and allow more slippage than the pump design permits, power is wasted. When seals swell and
drag, power is wasted. Seals of Viton® keep their resilience and don’t swell, thus preventing power waste
and helping hold down operating costs.
 16

Test Procedures
Property Measured Test Procedure
Compression Set ASTM D3955, Method B (25% deflection)
Compression Set—Low Temperature ASTM D1299, Method B (25% deflection)
Compression Set, O-Rings ASTM D1414
Hardness ASTM D2240, durometer A
Mooney Scorch ASTM D1646, using the small rotor. Minimum viscosity and time to a
1-, 5-, or a 10-unit rise are reported.
Mooney Viscosity ASTM D1646, ten pass 100°C and 121°C
ODR (vulcanization characteristics ASTM D2084
measured with an oscillating disk cure
meter)
Property Change After Oven Heat- ASTM D573
Aging
Stress/Strain Properties
100% Modulus ASTM D412, pulled at 8.5mm/s (20 in/min.)
Tensile Strength
Elongation at Break
Stiffness, Torsional, Clash-Berg ASTM D1043
Temperature Retraction ASTM D1329
Volume Change in Fluids ASTM D471
*Note: Test temperature is 24°C, except where specified otherwise

For further information please contact one of the offices below, or visit our website at
www.dupontelastomers.com/viton

Global Headquarters – Wilmington, DE USA European Headquarters - Geneva

Tel. +1-800-853-5515 Tel. +41-22-717-4000
+1-302-792-4000 Fax +41-22-717-4001
Fax +1-302-792-4450

South & Central America Headquarters - Brazil Asia Pacific Headquarters - Singapore
Tel. +55-11-4166-8978 Tel. +65-6275-9383
Fax +55-11-4166-8989 Fax +65-6275-9395

Japan Headquarters – Tokyo

Tel. +81-3-5521-2990
Fax +81-3-5521-2991

The information set forth herein is furnished free of charge and is based on technical data that DuPont Performance Elastomers believes to be
reliable. It is intended for use by persons having technical skill, at their own discretion and risk. Handling precaution information is given with the
understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since
conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection
with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential.
Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents.
Caution: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with
your DuPont Performance Elastomers customer service representative and read Medical Caution Statement H-69237.
DuPont™ is a trademark of DuPont and its affiliates.
Viton® and Viton® Extreme™ are trademarks or registered trademarks of DuPont Performance Elastomers.
Copyright © 1998, 2004, 2005 DuPont Performance Elastomers. All Rights Reserved.

(11/05) Printed in U.S.A.

Reorder no: VTE-H68134-00-F1105