Any of a variety of compounds used to fill and seal joints or openings in wood, metal, masonry and other construction materials. Some common types of sealants are Neoprene®, polysulfide, acrylic latex, butyl, polyurethane, foams and silicone.

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.