INTERNATIONAL PAINT

(www.amanpaint.com)

Interzinc® 12
Inorganic Zinc Rich Silicate

PRODUCT
DESCRIPTION
A two component solvent based inorganic zinc-rich ethyl silicate primer. Complies with the
composition and performance requirements of SSPC Paint 20.
PRODUCT
DESCRIPTION
As a metallic zinc pigmented primer to provide excellent protection to steel substrates; for use with
a wide range of high performance systems in offshore and onshore environments including oil
production platforms, refineries, bridges, tanks, pipework and structural steelwork.
Ideal for giving long term protection to structural steel prior to field topcoating.
Can be used for new construction and as fast drying primer, capable of application in a wide range
of climatic conditions including low temperatures.
INTENDED USES
Greenish Grey
Matt
62%
50-75 microns (2-3 mils) dry equivalent to
81-121 microns (3.2-4.8 mils) wet
8.30 m²/litre at 75 microns d.f.t and stated volume solids
331 sq.ft/US gallon at 3 mils d.f.t and stated volume solids
Allow appropriate loss factors
Airless Spray, Air Spray
PRACTICAL
INFORMATION FOR
INTERZINC 12
Colour
Gloss Level
Volume Solids
Typical Thickness
Theoretical Coverage
Practical Coverage
Method of Application
Drying Time
Temperature Touch Dry Hard Dry Minimum Maximum
¹ See International Protective Coatings Definitions and Abbreviations
Overcoating is dependent upon ambient conditions. The figures quoted above have been
determined at the quoted dry film thickness, temperature and 65% relative humidity. See Product
Characteristics for further advice.
Overcoating Interval with
recommended topcoats
5°C (41°F) 40 minutes 4 hours 36 hours Extended¹
15°C (59°F) 20 minutes 2 hours 24 hours Extended¹
25°C (77°F) 15 minutes 1 hour 16 hours Extended¹
40°C (104°F) 5 minutes 30 minutes 8 hours Extended¹
15°C (59°F)
16°C (61°F)
2.4000 kg/l (20.0 lb/gal)
REGULATORY DATA Flash Point
Product Weight
VOC
See Product Characteristics section for further details
3.76 lb/gal (451 g/l) USA - EPA Method 24
223 g/kg EU Solvent Emissions Directive
(Council Directive 1999/13/EC)

Interzinc® 12
Inorganic Zinc Rich Silicate

Page 1 of 4
Ref:2541
Issue Date:07/07/2009
Protective Coatings

Interzinc® 12
Inorganic Zinc Rich Silicate

All surfaces to be coated should be clean, dry and free from contamination. Prior to paint application all
surfaces should be assessed and treated in accordance with ISO 8504:2000.
Oil or grease should be removed in accordance with SSPC-SP1 solvent cleaning.
Abrasive Blast Cleaning
Abrasive blast clean to Sa2½ (ISO 8501-1:2007) or SSPC-SP6. If oxidation has occurred between
blasting and application of Interzinc 12, 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 40-75 microns (1.5-3.0 mils) is recommended.
Shop Primed Steelwork
Interzinc 12 is suitable for application to 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 Sa2½ (ISO 8501-1:2007) or SSPC-SP6.
Damaged / Repair Areas
All damaged areas should ideally be blast cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP6. However,
it is acceptable that small areas can be power tool cleaned to Pt3 (JSRA SPSS:1984) or SSPC-SP11,
provided the area is not polished. Repair of the damaged area can then be carried out using a
recommended zinc epoxy primer - consult International Protective Coatings for specific advice.
SURFACE
PREPARATION
Interzinc 12 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) whilst 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.
3.65 part(s) : 1.00 part(s) by volume
Suitable - Small areas Typically 25-50 microns (1.0-2.0 mils) can be
achieved
Not recommended
International GTA803 or
International GTA415
International GTA803 or International GTA415
Do not allow material to remain in hoses, gun or spray equipment. Thoroughly
flush all equipment with International GTA803. 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 all equipment immediately after use with International GTA803. 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.
Do not thin more than allowed by local
environmental legislation
Recommended
Recommended Gun DeVilbiss MBC or JGA
Air Cap 704 or 765
Fluid Tip E
Tip Range 0.38-0.53 mm (15-21 thou)
Total output fluid pressure at spray tip not less than
112 kg/cm² (1593 p.s.i.)
A 9 mm (0.375") fluid hose of maximum 15 metres
(49 ft) is recommended.
APPLICATION Mixing
Mix Ratio
Working Pot Life
Airless Spray
Air Spray
(Pressure Pot)
Brush
Roller
Thinner
Cleaner
Work Stoppages
Clean Up
5°C (41°F) 15°C (59°F) 25°C (77°F) 40°C (104°F)
12 hours 8 hours 4 hours 2 hours
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Interzinc® 12
Inorganic Zinc Rich Silicate

Prior to overcoating, Interzinc 12 must be clean, dry and free from both soluble salts and excessive
zinc corrosion products.
Surface temperature must always be a minimum of 3°C above dew point.
When applying Interzinc 12 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 dry film thickness, 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.
For high temperature systems the thickness of Interzinc 12 should be restricted to 50 microns (2
mils) d.f.t. Continuous dry temperature resistance of Interzinc 12 is 400°C (752°F) if left
untopcoated, however, if this product is used as a primer for Intertherm 50, the dry temperature
resistance will be 540°C (1004°F).
Excessive film thickness and/or over-application of Interzinc 12 can lead to mudcracking, which will
require complete removal of the affected areas by abrasive blasting and re-application in
accordance with the original specification.
Care should be exercised to avoid application of dry film thickness in excess of 125 microns (5
mils).
Untopcoated Interzinc 12 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
• ASTM A490 Class B Slip Coefficient
Note: VOC values quoted are based on maximum possible for the product taking into account
variations due to colour differences and normal manufacturing tolerances.
Low molecular weight reactive additives, which will form part of the film during normal ambient cure
conditions, will also affect VOC values determined using EPA Method 24.
PRODUCT
CHARACTERISTICS
When it is necessary for Interzinc 12 to be overcoated by itself due to low dry film thickness, the
coating surface must be fresh and unweathered. A minimum of 50 microns (2 mils) d.f.t. of any
subsequent coat of Interzinc 12 is needed to ensure good film formation.
Before overcoating with recommmeded topcoats ensure the Interzinc 12 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.
Suitable topcoats are:
Intercryl 530 Intergard 475HS
Intercure 200 Interseal 670HS
Intercure 420 Intertherm 50
Intergard 251 Intertherm 715
Intergard 269
In some cases it may be necessary to apply a mist coat of suitable viscosity to minimise bubbling.
This will depend upon the age of the Interzinc 12, 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
SYSTEMS
COMPATIBILITY
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Interzinc® 12
Inorganic Zinc Rich Silicate

Rect Top
Rect
Bottom
D
et
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Top
Further information regarding industry standards, terms and abbreviations used in this data sheet
can be found in the following documents available at www.international-pc.com:
• Definitions & Abbreviations
• Surface Preparation
• Paint Application
• Theoretical & Practical Coverage
Individual copies of these information sections are available upon request.
ADDITIONAL
INFORMATION
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.
SAFETY
PRECAUTIONS
PACK SIZE Unit Size Part B Part B
Vol Pack Vol Pack
For availability of other pack sizes, contact International Protective Coatings.
15 litre 11.77 litre 15 litre 3.23 litre 20 litre
4.65 US gal 3.65 US
gal
5 US gal 1.01 US
gal
3 US gal
SHIPPING WEIGHT Unit Size Part A Part B
15 litre 13.5 kg 24.8 kg
4.65 US gal 37.7 lb 62.8 lb
Shelf Life Binder: 6 months minimum at 25°C.
Powder: 12 months minimum at 25°C (77°F).
Subject to re-inspection thereafter. Store in dry, shaded
conditions away from sources of heat and ignition.
STORAGE
The information in this data sheet is not intended to be exhaustive; any person using the product for any purpose other than that specifically recommended in this data sheet without first
obtaining written confirmation from us as to the suitability of the product for the intended purpose does so at their own risk. All advice given or statements made about the product
(whether in this data sheet or otherwise) is correct to the best of our knowledge but we have no control over the quality or the 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 at all for the performance of the product or for (subject to the
maximum extent permitted by law) any loss or damage arising out of the use of the product. We hereby disclaim any warranties or representations, express or implied, by operation of
law or otherwise, including, without limitation, any implied warranty of merchantability or fitness for a particular purpose. All products supplied and technical advice given are subject to
our Conditions of Sale. You should request a copy of this document and review it carefully. The information contained in this data sheet is liable to modification from time to time in the
light of experience and our policy of continuous development. It is the user's responsibility to check with their local International Paint representative that this data sheet is current prior to
using the product.
Issue date: 07/07/2009
Important Note
Copyright © AkzoNobel, 07/07/2009.
, International and all product names mentioned in this publication are trademarks of, or licensed to, AkzoNobel.
H & S Beschichtungssysteme Vertriebs GmbH | Niekamp 24 | 59399 Olfen | Telefon +49 (2595) 3435 / 3016 |
Telefax +49 (2595) 9120 | info@hus-beschichtungssysteme.de | www.hus-beschichtungssysteme.de
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