International Interzinc 42

Part A and B: UN1263 (Class: 3, Pk Grp: III)
A two component, metallic zinc primer for steel in aggressive environments.
Available in 10 Litres
From £455.17 £379.31
In stock
Only %1 left
Product Description

International Interzinc 42 is a two component, metallic zinc primer for steel in aggressive environments.

Best Uses

As a zinc primer for application as part of a coating system for structures in aggressive environments in a wide range of industries, including offshore facilities, petrochemical plants, pulp and paper mills, bridges and power plants. Interzinc 42 has been designed for use in maintenance situations and as a primer at new construction.


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 42, 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 42 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 SSPCSP6.

Technical Details


Interzinc 42 is designed for application to correctly prepared steel. However, it is also possible to apply over approved prefabrication primers.

Recommended topcoats are:

Technical Info

Components: Two Part
Type: Metallic Zinc Primer
Finish: Matt
Stock Colours: Red, Grey and Green
Tintable: No
VOC Content: 226.0g per Litre
Volume Solids: 55%
Suitable Substrates: For steel
Application Method: Brush, Roller, Air Atomised Spray or Airless Spray
Theoretical Coverage: 7.33m2 per litre at 75 microns
Wet Film Thickness (WFT): 91 - 136 microns
Dry Film Thickness (DFT): 50 - 75 microns
Induction Time: -
Pot Life: 16 hours at 15°C
Touch Dry: 60 minutes at 15°C
Overcoatable: 3 hours at 15°C
Hard Dry: 4 hours at 15°C
Cleaner / Thinner: Cleaner: International GTA822. Thinner: International GTA220
Shelf Life: 12 months at 25°C
Packaging: Available in 10 Litres

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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