Brand New Rector Heat Shield 11oz Tubes x2 RectorShield is a heat absorbing paste that prevents damage to sensitive controls, valves, plastic faucet parts/equipment & soldered connections. It lowers heat transfer by absorbing thermal energy from heat/flames while soldering, brazing & welding Features In comparison tests, RectorShield kept the protected side an average 22% cooler than other brands Does not splatter, drip, crack, dry out or separate, and stays in place during heating May be used after being frozen and then thawed Safe to use, non-staining, easy to clean up and Odorless - no offensive fumes Biodegradable and safe for the environment