2300® Construction Tripolymer Sealant is a single component, high-performance elastomeric sealant for use in a wide variety of roofing, trim, architectural metal, manufacturing, underdeck system, solar roof system, and general construction applications. 10 Standard colors are now available in plastic, along with crystal clear in a clear plastic cartridge. Same great formula, but now also available in a CLEAR waterproof PLASTIC cartridge! Rain-soaked, blown-out cartridges are a thing of the past with the 2300 Sealant plastic cartridge. Plus, there is the added benefit of being able to see how much sealant is left in the tube.