*International Interzone 505

This product is now discontinued.
Out of stock
Product Description

This product is now discontinued. Please contact our technical team for a suitable alternative.

International Interzone 505 is a high solids, low VOC, high build epoxy primer/intermediate or finish coat. Reinforced with chemically resistant high aspect ratio glass flake for enhanced durability and corrosion resistance.

Best Uses

International Interzone 505 is formulated for the protection of steelwork in all corrosive environments including splash zone areas on offshore structures, under deck, decks and above water areas, pilings, pulp and paper mills, bridges and chemical plants.

International Interzone 505 provides excellent long term, anti-corrosive and anti-abrasion protection in both new construction and maintenance situations. Suitable as part of a non-slip deck system in conjunction with appropriate aggregate.

Approved for use as on Highways, Network Rail New Works and London Underground New Works.


The performance of this product will depend upon the degree of surface preparation. The surface to be coated must be clean 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. 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 Interzone 505, 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 50-75 microns (2-3 mils) is recommended.

Ultra High Pressure Hydroblasting / Abrasive Wet Blasting
May be applied to surfaces prepared to Sa2½ (ISO 8501-1:2007) or SSPC-SP6 which have flash rusted to no worse than Grade HB2½M (refer to International Hydroblasting Standards) or Grade SB2½M (refer to International Slurry Blasting Standards). It is also possible to apply to damp surfaces in some circumstances. Further information is available from International Protective Coatings.

Technical Details


  • Highways Agency Approved - Item No. 123
  • Network Rail New Works Systems Approved - N2 Protective Treatment - Certificate Ref N2/039
  • Network Rail New Works Systems Approved - N2F Protective Treatment - Certificate Ref XN90/N2F-086
  • London Underground New Works Systems Approved - LuL APR No. 1929 - N2 Protective Treatment - Certificate Ref XN90/N2F-086. Suitable for surface stations. Can be applied to below ground station infrastructure but not to tunnel infrastructure.
  • Norsok M-501 System 1 (Pre Qualified)
  • Norsok M-501 System 7A (Pre Qualified)
  • Norsok M-501 System 7B (Pre Qualified)


Interzone 505 can be applied directly to blasted steel but can also be used over the following primers for underwater systems:

When used in aggressive exterior exposure environments the following primers are recommended for Interzone 505:

The following topcoats are recommended for Interzone 505:

Technical Info

Components: Two Part
Type: Solvent Based
Finish: Semi Gloss
Stock Colours: Yellow, Grey and Off White
Tintable: Yes, to a limited range. Contact our sales team to check specific colours. Please note, bespoke tints are non refundable / exchangeable
VOC Content: 164.0g per Litre
Volume Solids: 90%
Suitable Substrates: For the protection of steelwork in all corrosive environments
Application Method: Airless Spray, Air Spray, Brush, Roller
Theoretical Coverage: 2.25 m2 per litre at 400 microns
Wet Film Thickness (WFT): 333 - 556 microns
Dry Film Thickness (DFT): 300 - 500 microns
Induction Time: -
Pot Life: 90 minutes at 15°C
Touch Dry: 6 hours at 15°C
Overcoatable: Between 14 hours and 5 days at 15°C
Hard Dry: 14 hours at 15°C
Cleaner / Thinner: Thinning is not normally required. Clean up with International GTA822 (or International GTA415)
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

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