Fosroc Nitocote CM210

Product Overview

Nitocote CM210 is a two-component polymer-modified elastomeric cementitious coating supplied in pre-packaged form. It is mixed on-site with a slow-speed drill and paddle, then applied to form an elastomeric impermeable membrane. Available in grey and white, the product is designed for waterproofing water-retaining and water-excluding structures such as potable water tanks, reservoirs, canals, and culverts. It can be applied to concrete, brick, and blockwork substrates and maintains excellent crack accommodation even after long-term water immersion — a condition many cementitious coatings cannot satisfy.

Key Features

• Potable water approved — Approved by the UK Drinking Water Inspectorate (DWI) (per manufacturer)
• High water pressure resistance — Withstands high positive and negative hydrostatic pressures
• Crack bridging after immersion — Maintains excellent crack accommodation after prolonged water immersion
• Strong adhesion — Excellent bond to concrete and masonry substrates
• Damp surface application — Can be applied directly to green or damp concrete
• Chemical barrier — Effective barrier to sulphates and chlorides
• Versatile application — Suitable for brush, roller, trowel, or spray application
• Ample working time — Sufficient working life after mixing

Applications

• Potable water tanks (rooftop and underground)
• Reservoirs and water storage facilities
• Canals and culverts
• Basements and underground structures (resists negative water pressure)
• Concrete, brick, and blockwork structures
• Water-retaining structures requiring long-term immersion resistance

Packaging

23KG per set (18kg powder component + 5kg liquid polymer). Available in grey and white.

Important Notes

• Not suitable for application in low-temperature conditions
• Protect from rainfall and running water during application and initial curing
• Not recommended for external surfaces where aesthetic appearance is critical, as curing conditions may cause colour variations
• Liquid component must not be frozen during storage
• Shelf life is six months in unopened packs
• Strict adherence to mixing instructions is essential — inadequate mixing may compromise performance
• For detailed application methods, coverage rates, and technical parameters, please refer to the official product data sheet

FAQ

How do I choose between CM210 and Brushbond for potable water tanks?

Both are approved for potable water contact (per manufacturer). CM210 resists both positive and negative water pressure with higher elasticity, making it ideal for underground tanks subject to external water pressure. Brushbond offers better breathability, making it more suitable for rooftop water tanks where moisture vapour permeability is needed.

Can CM210 be used for basement waterproofing?

Yes, it is well suited for this application. CM210 resists negative water pressure (groundwater pushing from outside through the structure), making it an ideal choice for basement and underground waterproofing. It can be applied directly to damp concrete surfaces without waiting for the substrate to dry completely.