International Interzinc 22

Part A: UN1263 (Class: 3, Pk Grp: III), Part B: Non Hazardous
A two component, rapid recoat, fast curing solvent based inorganic zinc rich ethyl silicate primer.
Available in 13.75 Litres in Green Grey
£413.71 £344.76
In stock
Product Description

International Interzinc 22 is a two component, rapid recoat, fast curing solvent based inorganic zinc rich ethyl silicate primer. Conforms to SSPC Paint 20 Level 1. Available in ASTM D520, Type II zinc dust version as standard.

Best Uses

International Interzinc 22 is formulated as a zinc rich 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. Interzinc 22 can also be used as tank coating suitable for the carriage of different chemical cargoes (e.g. styrene) according to International Paint’s chemical resistance guide.

International Interzinc 22 provides excellent corrosion protection for correctly prepared steel substrates, up to temperatures of 540°C (1004°F) when suitably topcoated. Fast curing primer capable of application in a wide range of climatic conditions.

Available in Green Grey in a matt finish.


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 (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 40-75 microns (1.5-3.0 mils) 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 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 Promain's technical team for specific advice.

Interzinc 22 is supplied in two parts, a liquid Binder base component QHA285 (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

Technical Details


  • AISC Specification 348-04 Research Council for Structural Connections Class B Coating
  • UNE 48293 (Spain)


When it is necessary for Interzinc 22 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 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:

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 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.

Technical Info

Components: Two Part
Type: Solvent Based Inorganic Zinc Rich Ethyl Silicate Primer
Finish: Matt
Stock Colours: Greenish Grey
Tintable: No
VOC Content: 216.0g per Litre
Volume Solids: 63%
Suitable Substrates: For both maintenance and new construction of bridges, tanks, pipework, offshore structures and structural steelwork
Application Method: Air Atomised Spray or Airless Spray
Theoretical Coverage: 8.4m2 per litre at 75 microns
Wet Film Thickness (WFT): 79 - 119 microns
Dry Film Thickness (DFT): 50 - 75 microns
Induction Time: -
Pot Life: 8 hours at 15°C
Touch Dry: 20 minutes at 15°C
Overcoatable: 9 hours at 15°C
Fully Cured: 90 minutes at 15°C
Cleaner / Thinner: Clean all equipment immediately after use with International GTA803 / International GTA415 / International GTA138
Shelf Life: Part A 6 months, Part B 12 months minimum at 25°C
Packaging: Available in 13.75 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.

Related Products