Heat Freeze Heat Absorption Paste (formerly Cool Blue) is an all natural, cellulose-based product that prevents warping and damage by protecting heat-sensitive areas around the welding site. With this heat-resistant paste, you can make weld repairs without the need to disassemble parts. Heat Freeze paste can be used in any position and applied on a variety of surfaces, including wood, glass, chrome, plastic, vinyl, rubber, metal, and painted-on areas. It can even be used as a jig in jewelry applications and in auto body repair applications to prevent warping. The paste is reusable for life, protects up to 3000 °F, wipes off easily, and will not dry on to the surface you've applied it to.