The Everbuild Fix & Fill Expanding Foam is a quick-setting polyurethane-based foam that significantly expands on application, yielding up to 50 times the original can contents. It can be used for a wide range of building applications and is incredibly effective as an insulator, in soundproofing and filling gaps around the home or office. This 750ml hand-held version allows for easy and controlled application, with minimal mess or waste.