Lucas #5400 is a high-performance, thermoplastic elastomer-based roofing sealant. The multipurpose sealant adheres to most surfaces, including asphalt, shingles, modified bitumen, metal, Kynar, wood, concrete, tile, masonry and others. It is available in three grades: brush grade, trowel grade and caulk grade. Lucas #5400 is manufactured from UV-stable SEBS thermoplastic elastomers while the asphalt portion of the formula adheres to asphaltic materials and other surfaces. The product will not crack or harden over time and is easy to apply even in cold weather.