Soudal Gap Filling Expanding Foam 750ml is a polyurethane expanding foam for suitable building gaps and joints where the manufacturer’s product guidance permits its use. Expansion and adhesion vary by substrate and conditions, so prepare surfaces and follow the can instructions for application, curing and trimming. Wear the PPE specified on the label, provide adequate ventilation, keep away from ignition sources and do not use where the product is unsuitable for the substrate, temperature or fire-rating requirement.