SILL PLATE SEALER - Sill plate sealer is designed to fill the air gaps between the sill plate and the foundation, reducing air infiltration to provide savings on heating and air conditioning costs. It"s durable moisture resistant characteristics prevent water and insect intrusion, two of the leading cause of seal plate rot. Recommended for: A sill plate gasket, Around windows and doors.Seals out water(moisture), air, insects, and termites. Reduces air and moisture movement, prevents sill plate rot, reduces labor requirment, will not deteriorate, made of high grade polyethylene, prevents damage to sill plate, provides saving on heating and cooling.