A high performance, polyurethane expanding foam, fire rated and tested to BSEN 1366-4. Seals irregular gaps and expands over 40 times the can volume. This foam can be used at temperatures from +5°C to +25°C. The cured foam is semi-rigid and predominantly close-celled. The fresh foam adheres to most common building materials. Window setting (where a clean and controlled backfill is required) and entrance door linings. Can also be used for any kind of small breakthroughs in walls and other cavities.