CHR HM350 PTFE films provide a conformable release surface and exhibit a remarkably low coefficient of friction and non-stick properties. PTFE films have high temperature resistance and are virtually unaffected by all chemicals. At elevated temperatures, PTFE film still retains excellent tensile strength. - CHR HM350 is manufactured from modified high-modulus PTFE film coated with high temperature silicone adhesive. Service temperatures range from -100 to 500 °F. This tape construction is weather resistant, stable and non-toxic.