B2 rated polyurethane foam filler. The cured foam is a good temperature and sound insulator and has strong adhesive properties. Used for installation of doors and windows, insulation and fixing of pipework, filling gaps and holes, fixing wall panels and roof tiles and for thermal insulation. Applications are: window setting (where a clean and controlled backfill is required), entrance door linings, any kind of small break-throughs in walls and other cavities. Quick curing with an expanding volume of 50-70%.