Made from thicker and denser fiberglass than standard spark-resistant sleeving, this sleeving is more abrasion resistant and provides better insulation. The specially formulated silicone rubber coating sheds sparks, molten metal splash, hydraulic fuel, and lubricating oil. It also resists fraying. Exposure to a torch will char the coating, but will not scorch the fiberglass inner layer. It can withstand short-term flame exposure up to 2000° F, and is flame rated VW-1 to meet requirements for preventing the spread of flames based on a timed test of vertically suspended material. Because this sleeving is non-expandable, it does not stretch, so it’s best for applications where you know the exact diameter of the items you need to protect.