Soudafoam Gap Fill is a one component and moisture curing polyurethane foam. The product will expand up to 3x its original size during curing, therefore it is mostly being used for filling larger gaps and cracks, or cavities that are difficult to reach.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.