Fosroc Nitocote EP403

Part A: UN3082 (Class: 9, Pk Grp: III), Part B: UN2735 (Class: 8, Pk Grp: I)
A two pack, solvent free, epoxy resin suitable for below ground or damp environments where concrete cannot be dried out.
Available in 2.5 Kg in Light Grey
£164.26 £136.88
In stock
Product Description

Fosroc Nitocote EP403 is a two pack, solvent free, epoxy resin protective coating for concrete and mild steel. Suitable for below ground or damp environments where concrete cannot be dried out.

Best Uses

Fosroc Nitocote EP403 when cured provides a corrosion, chemical and abrasion resistant film that is suitable for application to sewage works, marine environments, basements and tunnels. It is particularly useful where concrete surfaces are damp and cannot be dried out.

  • High build application
  • Can be applied directly to mild steel and concrete
  • Smooth, glossy, easy to clean surface
  • Corrosion, chemical and abrasion resistant
  • Can be applied to damp surfaces
  • Waterproof
  • Provides protection against water vapour and ground gases such as radon, carbon dioxide and methane

The material cures to provide a smooth, tough and resistant finish. Available in light grey.


Concrete surfaces
All surfaces must be smooth, sound and free from debris, loose or flaking material and areas of standing water. Surfaces must be free from contamination such as oil, grease, dust, loose particles and organic growth. Concrete surfaces must be fully cured, laitance free and free from any traces of shuttering release oils and curing compounds. Spalled surfaces, those containing large blow holes or surface imperfections, should be repaired or rendered using a Fosroc approved repair mortar or render.

All surfaces should then be grit blasted to remove all foreign matter and open up all blow-holes, and provide a suitable key for Nitocote EP403. All blow-holes and imperfections should be filled with Fosroc Nitomortar FC. Consult the data sheet for pot life and overcoating time.

Steel surfaces
All surfaces should be grit blasted to meet the requirements of BS 7079 Sa2.5. The lining work should be programmed so that newly cleaned steel is coated as soon as possible before the formation of rust or scale.

The minimum application temperature is 5°C.
All surfaces should be treated with two coats of Nitocote EP403. The thoroughly mixed material should be applied with a suitable brush. The first coat must be firmly applied and be well scrubbed into the surface, ensuring a uniform coating with a wet film thickness not less than 200 microns. The first coat should be allowed to dry for not less than 6 hours and not more than 18 hours at 20°C.

The second coat should be applied exactly as above, again achieving a wet film thickness not less than 200 microns. For cold weather working, it is recommended that Nitocote EP403 be stored in a heated building and removed immediately before use, as workability deteriorates and curing times increase at lower temperatures.

Technical Details

The fully cured film is resistant to:

  • Distilled water
  • Petrol
  • Xylene
  • 25% Sulphuric Acid
  • Saturated sodium Chloride
  • 50% Sodium Hydroxide

Technical Info

Components: Two Pack
Type: Solvent Free Epoxy
Finish: Smooth Glossy
Stock Colours: Light Grey
Tintable: No
VOC Content:
Volume Solids: 100%
Suitable Substrates: Concrete and Mild Steel
Application Method: Brush
Theoretical Coverage: 0.2 litres per m2
Wet Film Thickness (WFT): 7200 microns per coat
Dry Film Thickness (DFT):
Induction Time: -
Pot Life: 30 - 40 minutes at 20°C
Surface Dry:
Overcoatable: After 6 - 18 hours at 20°C
Fully Cured: 7 days at 20°C
Cleaner / Thinner: Nitocote EP403 should be removed from tools and equipment with Fosroc Solvent 102 immediately after use. Cured material
can only be removed mechanically.
Shelf Life: 2 years minimum in original unopened containers.
Packaging: Available in 2.5 Kg

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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