DroolShield® protects heater bands, wiring and insulation from the expensive and damaging effects of drool blow back. This eco-friendly, long-term solution for protecting your heater bands and blankets can withstand high temperatures up to 700°F. DroolShield® is a PTFE-coated, aircraft steel disc (clean-room suitable) that withstands temperatures up to 700ºF (370ºC). That makes this product a three-fold blow-back solution for you — reusable, long-term and affordable.