On Monday, the Garland Company announced the newest addition to its KEE-Stone family of thermoplastic roofing membranes: KEE-Stone HP. The new membrane incorporates ketone ethylene ester, Elvaloy HP, for “superior” flexibility, strength, and chemical and UV resistance.
KEE-Stone HP is a fleece-backed thermoplastic membrane designed as the cap sheet in a multi-ply hybrid system incorporating Garland-approved modified bitumen base sheets, the company said in a March 11 news release.