Fire Rated Expanding Foam.

Alfas bond FR is a kingspan approved product for use with composite panels. For use in joints Alfas Bond FR has excellent adhesive properties and once set, forms a strong bond to most building materials such as wood, brick, stone, cement, plaster, polystyrene, metals, and many plastics. This product acts as a fire seal for up to 4 hours when tested to BS476 Part 20 or for longer periods when used in conjunction with Alfasil FR, FR-2 or Alfacryl FR.