A good percentage of a building's heat loss is directly attributed to air infiltration. A significant part of this loss can be prevented by using Owens Corning® FoamSealR™ sill plate gasket to fill the gap between the sill plate and foundation wall for a tight, uniform fit. Made of polyethylene foam, FoamSealR™ sill plate gasket is durable and moisture resistant, so it will remain intact for years of energy-saving performance. FoamSealR™ is available in convenient rolls in three different widths to fit most standard frame construction.