Fosroc Nitocote SN502

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

Application

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.