As a non-toxic, heat-absorbing putty, Hot Block will block direct and conductive heat transfer on all types of surfaces and metals, including: joints, valves, fittings, composite panels, rubber and plastics. Stops all transfer of heat down 3000º in half an inch. Wrap it around copper, aluminum and steel pipes! Perfect for stopping warping while welding on flat panels or body work.
∙ 100 % Reusable!!!
∙ A must-have when brazing, soldering or welding!