Tradester Approved

100 % Re-usable!!!
A must-have when brazing, soldering, or welding!
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!