Carlisle SynTec, Carlisle, Pa., announced the addition of Sure-Flex PVC single-ply roofing membranes and accessories. Sure-Flex PVC heat weldable membranes for both mechanically fastened and fully adhered applications are 81 inches wide and available in 50-, 60- and 80-mil thicknesses. It will be available in a standard white with special colors available upon request. The membrane can withstand harsh weather conditions and long-term exposure to rooftop contaminants, and it offers a highly reflective light-color top ply.