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Protective Coatings
I n t e r z i n c® 2 2
I n o r g a n i c Z i n c - R i c h S i l i c a t e
W O R L D W I D E P R O D U C T R A N G E

Product A two component solvent based inorganic zinc rich ethyl silicate primer, containing 85%
Description zinc by weight, in the dry film. Complies with the composition and performance
requirements of SSPC Paint 20.

Intended Uses A metallic zinc primer suitable for use with a wide range of high performance systems
and topcoats in both maintenance and new construction of bridges, tanks, pipework,
offshore structures and structural steelwork.

Provides excellent corrosion protection for correctly prepared steel substrates, up to

temperatures of 1004°F (540°C) when suitably topcoated.

Fast drying primer capable of application in a wide range of climatic conditions.

Practical Color Greenish gray

Information for
Gloss Level Matte
Interzinc 22
Volume Solids 63%
Typical Thickness 2-3 mils (50-75 microns) dry equivalent to 3.2-4.8 mils
(79-119 microns) wet
Theoretical Coverage 337 sq.ft./US gallon at 3 mils d.f.t. and stated volume solids
8.4 m2/liter at 75 microns d.f.t. and stated volume solids
Practical Coverage Allow appropriate loss factors
Method of Application Airless spray, Air spray

Drying Time
Overcoating Interval with
recommended topcoats s
Temperature Touch Dry* Hard Dry* Minimum Maximum

41°F (5°C) 30 minutes 3 hours 36-48 hours Extended*

59°F (15°C) 20 minutes 90 minutes 24-36 hours Extended*
77°F (25°C) 10 minutes 60 minutes 16-24 hours Extended*
104°F (40°C) 5 minutes 30 minutes 8-12 hours Extended*

s Overcoating is dependent upon ambient conditions. The figures quoted above have
been determined at the quoted temperature and 65% relative humidity.
See Product Characteristics for further advice.

* See International Protective Coatings Definitions & Abbreviations

Regulatory Flash Point Binder (Part A) Powder (Part B) Mixed

Data 57°F (14°C) N/A 59°F (15°C)

Product Weight 21.2 lb/gal (2.5 kg/l)

VOC 4.09 lb/gal (490 g/l) USA - EPA Method 24

480 g/l UK - PG6/23(92), Appendix

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I n t e r z i n c® 2 2
I n o r g a n i c Z i n c - R i c h S i l i c a t e

Surface All surfaces to be coated should be clean, dry and free from contamination. Prior to
Preparation paint application all surfaces should be assessed and treated in accordance with
ISO 8504:1992.
Oil or grease should be removed in accordance with SSPC-SP1 solvent cleaning.
Abrasive Blast Cleaning
Abrasive blast clean to a minimum of SSPC-SP6 or Sa2½ (ISO 8501-1:1988), (or
SSPC-SP10 for optimum performance). If oxidation has occurred between blasting and
application of Interzinc 22, the surface should be reblasted to the specified visual
standard.
Surface defects revealed by the blast cleaning process, should be ground, filled, or
treated in the appropriate manner.
A surface profile of 1.5-3.0 mils (40-75 microns) is recommended.
Shop Primed Steelwork
Interzinc 22 is suitable for application to unweathered steelwork freshly coated with zinc
silicate shop primers.
If the zinc shop primer shows extensive or widely scattered breakdown, or excessive zinc
corrosion products, overall sweep blasting will be necessary. Other types of shop primer
are not suitable for overcoating and will require complete removal by abrasive blast
cleaning.
Weld seams and damaged areas should be blast cleaned to SSPC-SP6 or
Sa2½ (ISO 8501-1:1988).

Application Mixing Interzinc 22 is supplied in 2 parts, a liquid Binder base component

(Part A) and a Powder component (Part B). The Powder (Part B)
should be slowly added to the liquid Binder (Part A) while stirring
with a mechanical agitator. DO NOT ADD LIQUID TO POWDER.
Material should be filtered prior to application and should be
constantly agitated in the pot during spraying. Once the unit has
been mixed it should be used within the working pot life specified.
Mix Ratio 3.17 parts : 1.00 part by volume
Working Pot 41°F (5°C) 59°F (15°C) 77°F (25°C) 104°F (40°C)
Life 12 hours 8 hours 4 hours 2 hours
Airless Spray Recommended - Tip range 15-21 thou (0.38-0.53 mm)
- Total output fluid pressure at spray tip not
less than 1,600 p.s.i. (112 kg/cm2).
- A 3/8" (9 mm) fluid hose of maximum 49 ft
(15 meters) is recommended
Air Spray Recommended Gun DeVilbiss MBC or JGA
(Pressure Pot) Air Cap 704 or 765
Fluid Tip E
Brush Small areas only Typically 1-2mils (25-50 microns) can be
achieved.
Roller Not recommended
Thinner International GTA415 Do not thin more than allowed by local
(or GTA803) environmental legislation.
Cleaner International GTA415
(or GTA803)
Work Stoppages Do not allow material to remain in hoses, gun or spray equipment.
Thoroughly flush all equipment with International GTA415. Once
units of paint have been mixed they should not be resealed and it is
advised that after prolonged stoppages work recommences with
freshly mixed units.
Clean Up Clean all equipment immediately after use with International GTA415.
It is good working practice to periodically flush out spray equipment
during the course of the working day. Frequency of cleaning will
depend upon amount sprayed, temperature and elapsed time,
including any delays.
All surplus materials and empty containers should be disposed of in
accordance with appropriate regional regulations/legislation.

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I n t e r z i n c® 2 2
I n o r g a n i c Z i n c - R i c h S i l i c a t e

Product Prior to overcoating, Interzinc 22 must be clean, dry and free from both soluble salts
Characteristics and excessive zinc corrosion products.
Surface temperature must always be a minimum of 5°F (3°C) above dew point.
When applying Interzinc 22 in confined spaces ensure adequate ventilation.
The minimum overcoating interval is dependent upon the relative humidity during
cure. Below 65% relative humidity the minimum recoat period will normally be at least
24 hours, but will be dependent upon the ambient temperature and relative humidity
during the application and curing period.
It is recommended that prior to overcoating a solvent rub test to ASTM D4752 should be
undertaken. A value of 4 indicates a satisfactory degree of cure for overcoating purposes.
At relative humidities below 50%, curing will be severely retarded and humidity may
need to be increased by steam or water spraying. Alternatively, the use of Interzinc
accelerator solution may be necessary. Please consult International Protective Coatings
for further details in this situation.
Excessive film thickness and/or over-application of Interzinc 22 will lead to
mudcracking, which will require complete removal of the affected areas by abrasive
blasting and re-application in accordance with the original specification.
For high temperature systems the thickness of Interzinc 22 should be restricted to
2 mils (50 microns) d.f.t. Continuous dry temperature resistance of Interzinc 22 is 752°F
(400°C) if left untopcoated, however, if this product is used as a primer for Intertherm
50, the dry temperature resistance will be 1004°F (540°C).
Untopcoated Interzinc 22 is not suitable for exposure in acid or alkaline conditions or
continuous water immersion.
This product has the following specification approvals:
SSPC Paint Specification No. 20 Type 1C
BS5493 (1977) : EP2A
Saudi Aramco Specification 09 AMSS 071
Shell Specification 40.48.00.30 V1(g)
ASTM A490 Class B Slip Coefficient
BS4604 Friction Grip

Systems When it is necessary for Interzinc 22 is to be overcoated by itself due to low dry film
Compatibility thickness the coating surface must be fresh and unweathered. A minimum of 2 mils
(50 microns) d.f.t. of any subsequent coat of Interzinc 22 is needed to ensure good film
formation.
Before overcoating with recommended topcoats ensure the Interzinc 22 is fully cured
(see above) and if weathering has occurred all zinc salts should be removed from the
surface by fresh water washing, and if necessary scrubbing with bristle brushes.
Typical topcoats and intermediates are:
Intercryl 530 Intergard 475 HS
Intercure 200 Intertherm 50
Intercure 420 Interseal 670 HS
Intergard 251 Intertherm 715
Intergard 269
In some cases it may be necessary to apply a mist coat of suitable viscosity to minimize
bubbling. This will depend upon the age of the Interzinc 22, surface roughness and
ambient conditions during curing and application. Alternatively, an epoxy sealer coat,
such as Intergard 269, can be used to reduce bubbling problems.
For other suitable topcoats/intermediates consult International Protective Coatings.

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I n t e r z i n c® 2 2
I n o r g a n i c Z i n c - R i c h S i l i c a t e

Additional Further information regarding industry standards, terms and abbreviations used in this
Information data sheet can be found in the following sections of the International Protective
Coatings data manual:
• Definitions & Abbreviations
• Surface Preparation
• Paint Application
• Theoretical & Practical Coverage
Individual copies of these information sections are available upon request.
Safety Precautions This product is intended for use only by professional applicators in industrial situations
in accordance with the advice given on this sheet, the Material Safety Data Sheet and the
container(s), and should not be used without reference to the Material Safety Data
Sheet (MSDS) which International Protective Coatings has provided to its customers.
All work involving the application and use of this product should be performed in
compliance with all relevant national, Health, Safety & Environmental standards and
regulations.
In the event welding or flame cutting is performed on metal coated with this product,
dust and fumes will be emitted which will require the use of appropriate personal
protective equipment and adequate local exhaust ventilation.
If in doubt regarding the suitability of use of this product, consult International
Protective Coatings for further advice.

Pack Size 5 gallon unit Interzinc 22 binder 3.8 gallons in a 5 gallon plastic container
Interzinc 22 powder 1.2 gallons in a 5 gallon container
14 liter unit Interzinc 22 binder 10.64 liters in 15 liter plastic bottle
Interzinc 22 powder 3.36 liters in 20 liter container
For availability of other pack sizes contact International Protective Coatings
Shipping Weight U.N. Shipping No. 1263
5 gallon unit 37.5 lb (17.01 kg) Base (Part A) 66.2 lb (30.0 kg) Powder (Part B)
14 liter unit 25.8 lb (11.7 kg) Binder (Part A) 56.75 lb (25.8 kg) Powder (Part B)
Storage Shelf Life 6 months minimum at 77°F (25°C). Subject to re-inspection
thereafter. Store in dry, shaded conditions away from sources
of heat and ignition.

Disclaimer
The information given in this sheet is not intended to be exhaustive and any person using the product for any purpose other than that specifically recommended in this sheet
without first obtaining written confirmation from us as to the suitability of the product for the intended purpose does so at his own risk. Any warranty, if given, or specific Terms
& Conditions of Sale are contained in International’s Terms & Conditions of Sale, a copy of which can be obtained on request. While we endeavor to ensure that all advice we
give about the product (whether in this sheet or otherwise) is correct we have no control over either the quality or condition of the substrate or the many factors affecting the use and
application of the product. Therefore, unless we specifically agree in writing to do so, we do not accept any liability whatsoever or howsoever arising for the performance of the
product or for any loss or damage (other than death or personal injury resulting from our negligence) arising out of the use of the product. The information contained in this sheet
is liable to modification from time to time in the light of experience and our policy of continuous product development.

It is the user’s responsibility to check that this sheet is current prior to using the product. Issue date: 17th June 2002
Copyright © International Paint Ltd. and International are trademarks.
International Protective Coatings
Worldwide Availability
World Centre Asia Region Australasia Region Europe Region Middle East Region North America Region South America Region
P.O Box 20980 3 Neythal Road 115 Hyde Road P.O Box 20980 PO Box 37 6001 Antoine Drive Av Paiva 999,
Oriel House Jurong Town Yeronga Oriel House Dammam 31411 Houston Neves, Sao Gonçalo,
16 Connaught Place Singapore 628570 Brisbane 16 Connaught Place Saudi Arabia Texas 77091 Rio de Janeiro
London, W2 2ZB Queensland London, W2 2ZB Brazil
England Australia England

Tel: (44) 20 7479 6000 Tel: (65) 663 3066 Tel: (61) 7 3892 8888 Tel: (44) 20 7479 6000 Tel: (966) 3 812 1044 Tel: (1) 713 682 1711 Tel: (55) 21 624 7100
Fax: (44) 20 7479 6500 Fax: (65) 266 5287 Fax: (61) 7 3892 4287 Fax: (44) 20 7479 6500 Fax: (966) 3 812 1169 Fax: (1) 713 684 1514 Fax: (55) 21 624 7123
H&S (61) 1800 807 001

USA Toll Free Number (800) 589 1267

www.international-pc.com

GI2053
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