Ready-to-use and easy to hide, Great Stuff™ Multi-purpose black insulating foam sealant is the jack-of-all-trades solution for discreetly filling unwanted gaps across a wide range of projects, both inside and outside of the home. Multi-purpose black insulating foam sealant is a ready-to-use, foam sealant that fills, seals and insulates gaps up to 1 in. Specifically formulated for both indoor and outdoor use, this multi-purpose formulation can seal gaps and cracks in masonry, gas lines, landscaping, plumbing penetrations, vehicles, boats and much more.