BOSS 333 Foam Sealant 24oz

Easy to use, multi-purpose urethane foam.. Unlike ordinary sealants, it expands three times it's orgianl volume. Adheres tp all building materials except PTFE, silicon and polythelene. Seals by expaniding into gaps, cracks and cervices. Uses including insulating, stealing and filling gaps around pipes, plumbing fixtures, ductwork and foundations.