Profile: Kentucky-Indiana Lumber Co., Inc. offers construction materials and supplies. Our products include cabinets, decking, doors, drywall/gypsum, engineered lumber products, hardware, insulated products, lumber, millwork, moldings, plywood, roofing, siding, stair parts & stairways, truss wall panels and windows. Sill seal foam gasket is a flexible polyethylene gasketing strip, is primarily used to reduce air infiltration between the concrete foundation and sill plate or around windows. It works by compressing to seal the gaps between the foundation wall and sill plate. It also can help to fill almost any gap, joint, crack or crevice in which air can enter. This polyethylene foam gasket is now available in 50 foot long rolls.