Thermo-Sleeve's ultra light-weight construction provides more insulating than traditional bulky rubber-coated fiberglass. The aluminized sleeving reflects over 90 per cent of radiant heat and is fireproof and oil resistant. The Thermo-Sleeve can handle conductive heat temperatures of 750 degrees Fahrenheit and radiant heat temperatures up to 2000 degrees Fahrenheit. Typical applications include brake, fuel, oil and a/c lines