Seals, bonds and insulates, filling large and small holes in ceilings, floorboards, concrete or cinder block walls and around ducts, cables, plumbing areas and central heating pipes. It can be used indoors or outdoors. Polyurethane sealant with triple expansion fills holes, gaps and cracks. Insulates and prevents drafts. For interior or exterior use. The insulating foam forms an airtight, waterproof bond that seals out moisture and pests. Cured foam can be sanded, painted or stained. Contains no HCFC's or CFC's making it environmentally safe.