Bond It B1 is a high performance polyurethane expanding foam, tested for fire resistance to EN1366-4:2006. Seals irregular gaps and expands to over 40 times its can volume. The foam can be used at temperatures from +5C to +25oC. The cured foam is semi-rigid and predominantly close-celled. It is resistant to temperatures ranging from -40oC to +100oC and to ageing, but not to UV-rays. Noise and heat insulation values are excellent.