DAP No-Warp Foam is formulated to permanently seal around doors, windows and skylights without bowing jambs or deflecting frames. It exerts up to 95% less bowing pressure than competitive foams that may inhibit or prevent proper opening and closing of fenestrations. The expanding polyurethane foam sealant seals cracks and gaps up to 1-1/2 (38mm) wide to insulate and blocks drafts, moisture and insects resulting in improved comfort and reduced energy usage. It is formulated to meet the insulating and air sealing requirements of the professional commercial, industrial, agricultural and residential contractor and can be used on wood, masonry, insulating foam boards, metal, plastics and sheetrock. Once cured, it is non-toxic and fire-retardant.