Product Information

Silicone Sealants
Dow Corning® 799 Silicone Glass
and Metal Building Sealant
FEATURES Silicone sealant for glazing and weathersealing applications
• Primerless – can be used with
many materials without the use of APPLICATIONS
a primer Dow Corning® 799 Silicone Glass and Metal Building Sealant is designed for:
• Noncorrosive – will not react with • Conventional glazing applications
or corrode common building • Weatherseal applications including perimeter sealing of doors and windows
materials • Sealing around metal building flashings, gutters and gutter outlets
• Fast cure – 5 to 10 minutes tooling • Factory-applied glass where it would serve as the primary seal bedding
time and 20 minutes tack-free time compound in a finished sash
• Excellent weather resistance
against sunlight, rain, snow, and TYPICAL PROPERTIES
temperature extremes
Specification Writers: These values are not intended for use in preparing
• Long-life reliability – cured sealant specifications. Please contact your local Dow Corning sales office or your Global
stays elastic from -40°C to 149°C Dow Corning Connection before writing specifications on this product.
(-40 to 300°F)
• AAMA Certified Test* Property Unit Result
As Supplied
COMPOSITION ASTM C 679 Tack-Free Time, 50% RH minutes 20
Curing Time, 50% RH at 25°C(77°F) days 7 – 14
• One-part RTV silicone sealant ASTM D 2202 Flow, Sag or Slump Nil
Working Time minutes 5 – 10
As Cured
ASTM C 661 Durometer Hardness, Shore A points 30

As Cured – After 14 days at 25°C (77°F)

ASTM D 412 Ultimate Tensile Strength psi (MPa) 230 (1.59)
ASTM D 412 Ultimate Elongation percent 500
*
ASTM: American Society for Testing and Materials.

DESCRIPTION years of worry-free performance

Dow Corning 799 Silicone Glass and against rain, sun, and temperature
Metal Building Sealant is a extremes.
noncorrosive sealant that cures in the
presence of atmospheric moisture. Approvals/Specifications
This product exhibits unprimed ASTM Specification C-920 Type S,
adhesion to many construction Grade NS, Class 25, Use NT, G and
materials. Once cured, the sealant A.
forms a durable and flexible bond with
most building materials. In most cases, HOW TO USE
no prime coat is required. Please refer to the Dow Corning
Americas Technical Manual, Form No.
Dow Corning 799 Silicone Glass and 62-1112, for detailed information on
Metal Building Sealant available in joint design, surface preparation and
clear, black, white and gray. installation procedures.

Dow Corning 799 Silicone Glass and

Metal Building Sealant will provide
Preparation Use only with adequate ventilation. Avoid • For structural silicone glazing
prolonged breathing of vapor and prolonged
Clean all joints and glazing pockets, applications
or repeated skin contact. Always follow
removing all foreign matter and solvent container label instructions and local, • In totally confined spaces where
contaminants such as grease, oil, state and federal regulations. sealant cannot cure because of a
dust, water, frost, surface dirt, old lack of atmospheric moisture
sealants or glazing compounds, and HANDLING • On surfaces that will be painted
protective coatings. PRECAUTIONS (the paint film will not stretch
PRODUCT SAFETY with the extension of the sealant
Metal, glass and plastic surfaces INFORMATION REQUIRED FOR and may crack or peel)
should be cleaned by mechanical or SAFE USE IS NOT INCLUDED IN • On wet or frost-laden surfaces
solvent procedures. Detergent or THIS DOCUMENT. BEFORE • On substrates that bleed oil or
soap and water treatment are not HANDLING, READ PRODUCT plasticizers
acceptable. In all cases where used, AND MATERIAL SAFETY DATA
solvents should be wiped on and off SHEETS AND CONTAINER Dow Corning 799 Silicone Glass and
with clean, oil-and lint-free cloths.1 LABELS FOR SAFE USE, Metal Building Sealant:
PHYSICAL AND HEALTH • May discolor sensitive metals
Priming HAZARD INFORMATION. THE such as copper and brass
Consult Dow Corning for priming MATERIAL SAFETY DATA • May stress-crack polycarbonate
recommendations for various SHEET IS AVAILABLE ON THE
substrates. NOTE: Prior to general DOW CORNING WEBSITE AT This product is neither tested nor
job use, place a bead of sealant on DOWCORNING.COM, OR FROM represented as suitable for medical or
the substrate material to test YOUR DOW CORNING pharmaceutical uses.
adhesion. REPRESENTATIVE, OR
DISTRIBUTOR, OR BY CALLING
Application HEALTH AND
YOUR GLOBAL DOW CORNING
Install back-up material or joint CONNECTION. ENVIRONMENTAL
filler, setting blocks, spacer shims INFORMATION
and tapes as specified. Apply To support Customers in their
Dow Corning 799 Silicone Glass and
USABLE LIFE AND
product safety needs, Dow Corning
Metal Building Sealant in a STORAGE has an extensive Product
continuous operation using a positive When stored in original, unopened
Stewardship organization and a team
pressure adequate to properly fill and containers at or below 32°C (90°F),
of Product Safety and Regulatory
seal the joint. Dow Corning 799 Silicone Glass and Compliance (PS&RC) specialists
Metal Building Sealant has a usable
available in each area.
life of 24 months from date of
Tool or strike Dow Corning 799
manufacture. Refer to product
Silicone Glass and Metal Building For further information, please see
packaging for “Use By” date.
Sealant with light pressure to spread our website, dowcorning.com or
the material against the back-up consult your local Dow Corning
material and the joint surfaces. A PACKAGING representative.
tool with a concave profile is INFORMATION
recommended to keep the sealant Dow Corning 799 Silicone Glass and LIMITED WARRANTY
within the joint. Metal Building Sealant is packaged
INFORMATION – PLEASE
in 10.3-fl oz (305-mL) disposable
cartridges that fit ordinary caulking READ CAREFULLY
Dow Corning 799 Silicone Glass and
guns, 4.5-gal (17-L) bulk pails and The information contained herein is
Metal Building Sealant can be
48-gal (182.4-L) fiber drums. It can offered in good faith and is believed
applied at outdoor temperatures as
be dispensed by many air-operated to be accurate. However, because
low as -37°C (-35°F) provided that
guns and most types of bulk conditions and methods of use of our
surfaces are clean, dry and frost-free.
dispensing equipment. products are beyond our control, this
information should not be used in
Excess sealant should be cleaned
substitution for customer’s tests to
from glass, metal and plastic surfaces LIMITATIONS ensure that our products are safe,
while still uncured using a Dow Corning 799 Silicone Glass and
effective, and fully satisfactory for
commercial solvent such as Metal Building Sealant is not
the intended end use. Suggestions of
isopropyl, xylene, toluene or methyl recommended for use:
use shall not be taken as inducements
ethyl ketone.1 • Below grade or in horizontal to infringe any patent.
joints where physical abuse or
1
Caution: When using flammable solvents, abrasion is likely to be
keep away from heat, sparks and open flames. encountered
Dow Corning is a registered trademark of Dow Corning Corporation.
We help you invent the future is a trademark of Dow Corning Corporation.
2011, August 29 XIAMETER is a registered trademark of Dow Corning Corporation.
Form No. 61-848F-01 © 1989 - 2011 Dow Corning Corporation. All rights reserved.
Dow Corning’s sole warranty is that
our products will meet the sales
specifications in effect at the time of
shipment.

Your exclusive remedy for breach of

such warranty is limited to refund of
purchase price or replacement of any
product shown to be other than as
warranted.

DOW CORNING
SPECIFICALLY DISCLAIMS
ANY OTHER EXPRESS OR
IMPLIED WARRANTY OF
FITNESS FOR A PARTICULAR
PURPOSE OR
MERCHANTABILITY.
DOW CORNING DISCLAIMS
LIABILITY FOR ANY
INCIDENTAL OR
CONSEQUENTIAL DAMAGES.

We help you invent the future.™

dowcorning.com

Dow Corning is a registered trademark of Dow Corning Corporation.

We help you invent the future is a trademark of Dow Corning Corporation.
2011, August 29 XIAMETER is a registered trademark of Dow Corning Corporation.
Form No. 61-848F-01 © 1989 - 2011 Dow Corning Corporation. All rights reserved.
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