Dicor White Ultra TPO Sealant - This is the first sealant made especially for TPO roofing. Thermoformed Flexible Plastic (TPO) does not degrade under solar UV radiation, making it an excellent material for roofing. However TPO’s chemical composition varies substantially from EPDM-style roofing, requiring a sealant specially formulated just for TPO, like the Ultra Sealant System. Once the Ultra Sealant Primer (see our part #12026950 - sold seperately) has been used, simply apply the Ultra Sealant like you would any traditional sealant. It is self-leveling and requires only a standard caulking gun. This System creates a permanent, watertight seal between the roof edges, screws, vents, etc. Works on any brand of TPO roofing. Use Ultra Sealant to seal any of the following: Roof edges, Vent pipes and covers, Plastic, Fiberglass*, Wood*, Aluminum*, Steel*, Masonry* (*No primer needed). Clear color. 1 - 10.3 tube per package.