Fosroc Nitroseal FOS PU250 600ml Concrete Grey

Fosroc Nitoseal PU250 is a one-part, high-performance polyurethane sealant that cures to a tough, elastic rubber. The waterproof, weather-tight seal accommodates joint movement and delivers long-lasting protection on concrete panels, fibre-cement boards, external cladding, blockwork, and brickwork.

Features + Benefits:

Elastomeric Flexibility: Handles thermal and structural movement without cracking or loss of adhesion.
Waterproof & UV-Resistant: Forms a durable skin that resists rain, sunlight, and temperature extremes for extended service life.
Excellent Substrate Bond: Adheres tenaciously to concrete, masonry, metals, and most façade materials with minimal priming.
One-Component Convenience: Supplied ready to gun—no on-site mixing means faster application and reduced waste.

Product Uses:

Sealing expansion and control joints in precast and tilt-up concrete panels;
Weather-proofing joints in fibre-cement or composite cladding systems;
Filling movement joints in blockwork and brickwork façades;
General exterior sealing where a flexible, abrasion-resistant joint seal is required.

Pack Size:

Typically available in 600 mL foil sausages and 400 mL cartridges; bulk 20 L pails supplied to order for large-scale projects.