SHELTERSEAL SILL SEALER A polyethylene gasket that seals the gap - between the foundation and the sill plate Air infiltration is a major cause of heat loss - in the home which ShelterSeal solves the problem Moisture resistant and will not deteriorate - after years of use It helps to also seal out insects Also for use around door and window frames SILL55 5.5 IN. X50 FT. SILL SEALER SIZE:5-1/2" x 50' COLOR:Blue