A flexible waterproofing material used to seal cracks, seams, or small breaks in a waterproofing or an air barrier system. Usually supplied in tubes and applied with a caulking gun. (See SEALANT)

SPFA believes that the path to a healthful, safe, high-quality and performing SPF installation travels through the hands of a knowledgeable, trained, experienced, and ideally PCP-certified professional contractor.