Froth-Pak™ Foam System is the all-in-one, self-contained, disposable kit for professional contractors to insulate walls and cavities and seal gaps and penetrations quickly and efficiently. Froth-Pak™ Insulation and Sealant Foam System is a Class-A Fire-Rated, 2-component, quick-cure polyurethane foam that effectively fills cavities, penetrations, and cracks in rim joists, roof-wall junctures, and around pipes and ducts up to 2 inches thick. Froth-Pak™ is a chemically cured foam that dispenses, expands, and becomes tack-free in seconds, saving pros time on the jobsite.