CRS carries Carlisle’s InsulFast Insulation Fasteners. They are used in conjunction with Carlisle’s 3″ (76 mm) Insulation Plate for insulation attachment in Sure-Seal, Sure-White, Sure-Flex, and Sure-Weld mechanically fastened and fully adhered roofing systems. – Due to issues with manufacturers obtaining raw materials and extreme turnaround times with our vendors, Insulation Fasteners are temporarily not available for purchase online.