Fosroc Nitocote SN502

UN3082 (Class: 9, Pk Grp: III)
A single pack, penetrating, hydrophobic silane-siloxane treatment for concrete and masonry.
Available in 25 Litres in Clear
£337.78 £281.48
In stock
Product Description

Fosroc Nitocote SN502 is a single pack, penetrating, hydrophobic silane-siloxane treatment for concrete and masonry.

Best Uses

Nitocote SN502 is a single component penetrating silane siloxane system which penetrates into porous substrates and then reacts to produce a bonded hydrophobic lining to the pores. Although allowing passage of water vapour from the substrate it significantly reduces the absorption of water and water borne salts.

Nitocote SN502 does not discolour most substrates and has excellent resistance to weathering.

Fosroc Nitocote SN502 is formulated to protect atmospherically exposed reinforced concrete structures from attack by chloride ions and water intrusion. The product is also suitable to protect other cementitious substrates and masonry. Nitocote SN502 is suitable for use on all types of structures, including those in coastal environments. It is equally suitable for new and existing structures.

  • Penetrates into substrates
  • Non-staining
  • Reduces water and chloride intrusion
  • Increases freeze thaw resistance
  • Minimises efflorescence
  • Allows water vapour to escape from the structure
  • Chemically resistant to ice melting compounds, fuels, oils and atmospheric contaminants


All surfaces should be dry and free from contamination such as oil, grease, loose particles, decayed matter, moss, algal growth, laitance and all traces of mould release oils and curing compounds. This is best achieved by lightly grit-blasting the surface. Where moss, algae or similar growths have occurred, treatment with a proprietary biocide should be carried out after the grit-blasting process.

In order to obtain the penetrating properties of Nitocote SN502, it is important that the correct rates of application and overcoating times are observed.

  • Number of coats: 2 flood coats
  • Theoretical application rate per coat: 0.2 litres per m2
  • Overcoating time: 2 hours at 20°C

Nitocote SN502 should be applied in two flood coats until the recommended total application rate of 0.4 litre per square metre has been achieved. This is best accomplished by using portable spray equipment. If in doubt about the condition of the substrate, contact our technical team. Nitocote SN502 should be allowed to dry for a minimum of 2 hours (at 20°C) before continuing.

Technical Details
Components: Single Pack
Type: Silane Siloxane
Finish: Nitocote SN502 may darken some polymer modified substrates and white cement. A trial area is recommended.
Stock Colours: Clear
Tintable: No
VOC Content: 656 g/L
Volume Solids:
Suitable Substrates: Concrete and Masonry
Application Method: Backpack Spray
Theoretical Coverage: 0.2 litres per m2 (2x flood coats)
Wet Film Thickness (WFT):
Dry Film Thickness (DFT):
Induction Time: -
Pot Life: -
Surface Dry:
Overcoatable: 2 hours at 20°C
Fully Cured:
Cleaner / Thinner: Nitocote SN502 should be removed from tools and equipment using Fosroc Solvent 102 immediately after use
Shelf Life: 12 months in original unopened containers.
Packaging: Available in 25 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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