Interzinc® 72
Epoxy Zinc-Rich
PRODUCT A two component, metallic zinc rich epoxy primer, designed to provide excellent corrosion
DESCRIPTION resistance both as a single coat and as a primer for a high performance coating system. Contains
90% zinc by weight in the dry film.
INTENDED USES As a factory or site applied primer, for use in high performance coating systems for the protection of
steel in aggressive environments such as offshore structures, refineries, peterchemical and
chemical plants, power stations, bridges and pulp and paper plants.
PRACTICAL Colour Grey
INFORMATION FOR
INTERZINC 72 Gloss Level Matt
Volume Solids 60%
Typical Thickness 50-75 microns (2-3 mils) dry equivalent to
83-125 microns (3.3-5 mils) wet
Theoretical Coverage 8 m²/litre at 75 microns d.f.t and stated volume solids
321 sq.ft/US gallon at 3 mils d.f.t and stated volume solids
Practical Coverage Allow appropriate loss factors
Method of Application Airless Spray, Air Spray, Brush, Roller
Drying Time
Overcoating Interval with
recommended topcoats
Temperature Touch Dry Hard Dry Minimum Maximum
10°C (50°F) 45 minutes 6 hours 8 hours Extended¹
15°C (59°F) 35 minutes 4 hours 6 hours Extended¹
25°C (77°F) 25 minutes 90 minutes 4 hours Extended¹
40°C (104°F) 20 minutes 45 minutes 2 hours Extended¹
¹ See International Protective Coatings Definitions and Abbreviations
REGULATORY DATA Flash Point Part A 32°C (90°F); Part B 33°C (91°F); Mixed 32°C (90°F)
Product Weight 2.77 kg/l (23.1 lb/gal)
VOC 149 g/kg EU Solvent Emissions Directive
(Council Directive 1999/13/EC)
See Product Characteristics section for further details
Protective Coatings
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Issue Date:07/07/2009
Ref:2568
Interzinc® 72
Epoxy Zinc-Rich
SURFACE All surfaces to be coated should be clean, dry and free from contamination. Prior to paint
PREPARATION 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 72, 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.
Shop Primed Steel
Interzinc 72 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 Sa2½ (ISO 8501-1:2007) or SSPC-
SP6.
APPLICATION Mixing Material is supplied in two containers as a unit. Always mix a complete unit
in the proportions supplied. Once the unit has been mixed it must be used
within the working pot life specified.
(1) Agitate Base (Part A) with a power agitator.
(2) Combine entire contents of Curing Agent (Part B) with Base
(Part A) and mix thoroughly with power agitator.
Mix Ratio 4.0 part(s) : 1.0 part(s) by volume
Working Pot Life 10°C (50°F) 15°C (59°F) 25°C (77°F) 40°C (104°F)
12 hours 10 hours 8 hours 5 hours
Airless Spray Recommended Tip Range 0.43-0.53 mm (17-21 thou)
Total output fluid pressure at spray tip not less
than 176 kg/cm² (2503 p.s.i.)
Air Spray Thinning may be Gun DeVilbiss MBC or JGA
(Pressure Pot) required. Air Cap 704 or 765
Fluid Tip E
Brush Suitable - small areas Typically 40-50 microns (1.6-2.0 mils) can be
only achieved
Roller Suitable - small areas Typically 40-50 microns (1.6-2.0 mils) can be
only achieved
Thinner International GTA220 Do not thin more than allowed by local
environmental legislation
Cleaner International GTA822
Work Stoppages Do not allow material to remain in hoses, gun or spray equipment.
Thoroughly flush all equipment with International GTA822. 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 GTA822. 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 approrpriate regional regulations/legislation.
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Interzinc® 72
Epoxy Zinc-Rich
PRODUCT In order to ensure good anti-corrosive performance, it is important to achieve a minimum system
CHARACTERISTICS dry thickness of 40 microns (1,5 mils). To achieve a uniform film at this thickness thinning at around
10% with International thinners will be required.
When applying Interzinc 72 by brush or roller, it may be necessary to apply multiple coats to
achieve the total specified system dry film thickness.
Surface temperature must always be a minimum of 3°C (5°F) above dew point.
This product will not cure adequately below 5°C (41°F). For maximum performance ambient curing
temperatures should be above 10°C (50°F).
Where Interzinc 72 is to be used as a primer for a coating system to be subjected to water
immersion, it is important to ensure that a minimum dry film thickness of 65 microns (2,5 mils) is
applied in order to provide adequate corrosion protection.
Over-application of Interzinc 72 will extend both the minimum overcoating periods and handling
times, and may be detrimental to long term overcoating properties.
Excessive film thickness may lead to splitting of the film when overcoated with high build systems.
In the event of Interzinc 72 being allowed to weather before being topcoated, it is important to
ensure that all zinc salts are removed prior to paint application, and recommended topcoats are
applied.
Interzinc 72 is not suitable for exposure in acid or alkaline environments.
This product has the following specification approvals:
• BS5493 (1977) : DF & KP1B
• BS4652:1995
• British Gas Specification PA9 and PA10
Note: VOC values are typical and are provided for guidance purpose only. These may be subject
to variation depending on factors such as differences in colour and normal manufacturing
tolerances.
SYSTEMS Interzinc 72 can be overcoated with a wide range of high performance topcoats including:
COMPATIBILITY
Intercure 200 Intergard 411
Intercure 420 Intergard 475HS
Intercure 422 Interseal 670HS
Intergard 251 Intersheen 73
Intergard 269 Intertuf 708
Intergard 400 Interzone 505
Intergard 405 Interzone 954
Intergard 410
For other suitable primers/topcoats consult International Protective Coatings.
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Interzinc® 72
Epoxy Zinc-Rich
D ADDITIONAL Further information regarding industry standards, terms and abbreviations used in this data sheet
et INFORMATION can be found in the following documents available at www.international-pc.com:
ail
T • Definitions & Abbreviations
o
p • Surface Preparation
• Paint Application
• Theoretical & Practical Coverage
Individual copies of these information sections are available upon request.
SAFETY This product is intended for use only by professional applicators in industrial situations in
PRECAUTIONS 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.
Rect Top
PACK SIZE Unit Size Part A Part B
Vol Pack Vol Pack
10 litre 8 litre 10 litre 2 litre 2.5 litre
For availability of other pack sizes, contact International Protective Coatings.
SHIPPING WEIGHT Unit Size Part A Part B
10 litre 27.3 kg 2.1 kg
STORAGE Shelf Life 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.
Rect
Bottom
Important Note
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
Copyright © AkzoNobel, 07/07/2009.
, International and all product names mentioned in this publication are trademarks of, or licensed to, AkzoNobel.
www.international-pc.com
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