"We are very pleased to announce that G1643, the Kraton polymer used in elastomeric roof coating formulations, surpassed ASTM D6083 requirements," said Mark Siebert, Vice President, Adhesive, Sealants and Coatings. "This SBC based polymer has a proven track record of improving the performance of roof coatings because it adds superior water resistance, improved adhesion, and increased elongation to formulations. It can be used to help lower volatile organic compounds in a solvented formulation, which have significant vapor pressures that can affect the environment and human health. In addition, our tested formulation can be used under the EPA's regulation for thermoplastic rubber coatings and mastic," he concluded.

A roof coating formulation containing G1643 can reduce total cost of installation and provide fast cure coatings that will work better in cold, humid, or wet conditions, says the company. Elastomeric roof coatings made with Kraton polymers will stand up better to ponding water, and provide excellent adhesion to all types of roofing substrates. This kind of coatings can be applied for example for low slope roofs, or high traffic areas, and are said to provide excellent reflectance to reduce energy costs, and extend the life of the roof.