Frequently Asked Questions

What is the difference between Nitomortar 30 and the Renderoc cementitious repair mortars?

Nitomortar 30 is epoxy-based while Renderoc products are cementitious (cement-based). The key differences are: Nitomortar 30 achieves much higher compressive strength (above 80 MPa versus 35 to 50 MPa for Renderoc), has excellent chemical resistance to acids, solvents, and fuels that cementitious mortars cannot match, and develops strength faster (typically usable in 24 hours). However, Nitomortar 30 is more expensive, requires three-component mixing, has a shorter pot life (30 to 45 minutes) requiring faster application, has different thermal expansion characteristics than concrete (which can cause stress at repair-concrete interfaces over temperature cycles), and is less suitable for large-area thick repairs. Cementitious Renderoc mortars are the first choice for most structural concrete repair; Nitomortar 30 is specified when very high strength, chemical resistance, or thin-section repair in chemically aggressive environments is the critical requirement.

Can Nitomortar 30 be used as a floor topping for a food processing plant?

Nitomortar 30 can be used as a floor system in food processing plants, but several considerations apply. First, the epoxy must be food-safe compliant — the cured epoxy in Nitomortar 30 should be inert and non-toxic after full cure, but specific food safety compliance documentation (including compliance with relevant Indian Food Safety and Standards Authority regulations) should be verified with Fosroc before specifying in direct food contact areas. Second, the floor surface must be cleanable to the hygienic standards required by the food processing facility, including resistance to hot cleaning water and CIP (clean-in-place) chemicals. Third, the smoothness or texture of the floor surface must meet the traction requirements for the specific area. Consult Space Arc Engineering for food processing flooring system specification.

What is the pot life of Nitomortar 30 and how does temperature affect it?

The pot life (working time after mixing all three components) of Nitomortar 30 is typically 20 to 30 minutes at 20 degrees C. In hot Indian summer conditions (above 35 degrees C), the pot life can be reduced to 10 to 15 minutes, which significantly reduces the area that can be prepared and applied before the material stiffens. In cooler conditions (15 degrees C), pot life is extended to 45 to 60 minutes. Managing pot life in hot weather requires mixing smaller batches, keeping the components cool before mixing (in a shaded or air-conditioned area), and having the substrate fully prepared and primed before mixing begins. Do not attempt to use Nitomortar 30 after it has begun to stiffen — forced application of material past its pot life produces a poor finish and reduced strength.