International Interseal 670HS

Part A: UN1263 (Class: 3, Pk Grp: III), Part B: UN3066 (Class 8, Pk Grp: III)
For use on a wide variety of substrates including hand prepared rusty steel.
Available in 5 and 20 Litres. Tintable to most RAL and BS shades.
From £88.86 £74.05
In stock
Only %1 left
Product Description

International Interseal 670HS is a low VOC, two component high build, high solids surface tolerant epoxy maintenance coating. NSF Certified to NSF/ANSI Standard 61. Network Rail M24.

Best Uses

International Interseal 670HS is used for application to a wide variety of substrates including hand prepared rusty steel, abrasive blast cleaned and hydroblasted steel, as well as a wide range of intact, aged coatings.

It provides excellent anti-corrosive protection in industrial, coastal structures, pulp and paper plants, bridges and offshore environments in both atmospheric exposure and immersion service.

NSF Certified to NSF/ANSI Standard 61 - NSF Certification is for tanks greater than 100 gallons (378.5 litres).


The performance of this product will depend upon the degree of surface preparation. The surface 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. Accumulated dirt and soluble salts must be removed. Dry bristle brushing will normally be adequate for accumulated dirt. Soluble salts should be removed by fresh water washing.

Abrasive Blast Cleaning: For immersion service, Interseal 670HS must be applied to surfaces blast cleaned to Sa2.5 (ISO 8501-1:2007) or SSPC-SP10. However, for atmospheric exposure best performance will be achieved when Interseal 670HS is applied to surfaces prepared to a minimum of Sa2.5 (ISO 8501-1:2007) or SSPC-SP6.
Surface defects revealed by the blast cleaning process, should be ground, filled, or treated in the appropriate manner. A surface profile of 50-75 microns (2-3 mils) is recommended.

Hand or Power Tool Preparation: Hand or power tool clean to a minimum St2 (ISO 8501-1:2007) or SSPC-SP2. Note, all scale must be removed and areas which cannot be prepared adequately by chipping or needle gun should be spot blasted to a minimum standard of Sa2 (ISO 8501-1:2007) or SSPC-SP6. Typically this would apply to C or D grade rusting in this standard.

Ultra High Pressure Hydroblasting/Abrasive Wet Blasting: May be applied to surfaces prepared to Sa2.5 (ISO 8501-1:2007) or SSPC-SP6 which have flash rusted to
no worse than Grade HB2.5M (refer to International Hydroblasting Standards) or Grade SB2.5M (refer to International Slurry blasting Standards). It is also possible to apply to damp surfaces in some circumstances. Further information is available from our Technical Team.

Aged Coatings: Interseal 670HS is suitable for overcoating a limited range of intact, tightly adherent aged coatings. Loose or flaking coatings should be removed back to a firm edge. Glossy finishes may require light abrasion to provide a physical ‘key’. See Product Characteristics section for further information.

Technical Details


  • Highways Agency Registered Approved - Item No. 116(a)
  • London Underground Maintenance Systems - LuL APR No. 2081. M20 Protective Treatment. Can be applied to below ground station infrastructure but not tunnel infrastructure
  • Network Rail Maintenance Systems Approved - M20 Protective Treatment. Certificate Ref XM92/M20-073
  • Network Rail Maintenance Systems Approved - M21 (Glass Flake & Colour Stripe) Protective Treatment. Certificate Ref XN92/M21-188
  • Network Rail Maintenance Systems Approved - M24 Protective Treatment. Certificate Ref XM92/M24-152
  • Certified to NSF/ANSI Standard 61


Interseal 670HS will normally be applied to correctly prepared steel substrates. However, it can be used over suitably primed surfaces. Suitable primers are:

Where a cosmetically acceptable topcoat is required the following products are recommended:

Other suitable primers/topcoats are available. Consult International Protective Coatings.

Technical Info

Components: Two Part
Type: Surface Tolerant Epoxy
Finish: Semi-gloss (Aluminium is eggshell)
Stock Colours: Aluminium
Tintable: Yes. Please note, bespoke tints are non refundable / exchangeable
VOC Content: 2.00 lb/gal (240 g/lt)
Volume Solids: 82% ± 3% (depends on colour)
Suitable Substrates: For steel surfaces
Application Method: Airless Spray, Air Spray, Brush, Roller
Theoretical Coverage: 6.56 m2/litre at 125 microns d.f.t and stated volume solids
Wet Film Thickness (WFT): 122-305 microns
Dry Film Thickness (DFT): 100-250 microns
Induction Time: -
Pot Life: 3 hours at 15°C
Touch Dry: 5 hours at 10°C
Overcoatable: After 24 hours minimum at 10°C if overcoating with 670HS or 16 hours at 10°C  overcoting interval with recommended topcoats
Hard Dry: 24 hours at 10°C
Cleaner / Thinner: Thinning is not normally required  - if you do need to thin use International GTA220 (or International GTA415 for NSF-approved schemed)
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.
Packaging: Available in 20 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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