One part, high performance, general purpose roof sealant and patching mastic over holes, cracks and splits, ponded water areas, ridges and for installing insulation breather vents.

An easy to dispense and install through the straw adapter included with each can and will expand to fill gaps of all dimensions in the most difficult locations. It will greatly reduce noise, dust and draughts and will block access by rodents, as well as a great insulator against heat and cold. Bostik Expanda Foam […]

Assortment of sizes

Description A clear, non-staining solvent-based primer/cleaner for promoting the adhesion of Polyurethane & Acrylic sealants and waterproof membrane systems to non-porous substrates such as hard plastics & most metals.

Description Designed for use with the Bostik polyurethane sealant range to ensure adhesion to porous and non porous substrates.