Silicone coated fiberglass sleeve is able to withstand high temperatures due to the combination of materials and properties they possess. Here is why:

Fiberglass base material: The sleeve is made from fiberglass, which is a high-temperature resistant material. Fiberglass is composed of fine strands of glass fibers that are woven together to form a strong and flexible fabric. This base material has excellent thermal insulation properties and can handle temperatures up to several hundred degrees Celsius.

Silicone coating: The fiberglass sleeve is coated with a layer of silicone, which provides additional protection and enhances its heat resistance. Silicone is a synthetic rubber-like material known for its excellent temperature resistance. It remains stable and flexible over a wide temperature range, typically between -60°C to 200°C (-76°F to 392°F). Some specialized silicone formulations can withstand even higher temperatures.

Heat insulation: The fiberglass base material combined with the silicone coating creates a barrier that helps to insulate and protect the underlying objects or wires from extreme heat. The sleeve acts as a thermal barrier, preventing the transfer of excessive heat to the adjacent components.

Thermal stability: The silicone coating on the fiberglass sleeve exhibits good thermal stability, meaning it retains its structural integrity and properties even under prolonged exposure to high temperatures. It resists degradation, melting, or burning, which enables the sleeve to withstand repeated cycles of heating and cooling.

Electrical insulation: In addition to its heat resistance, silicone-coated fiberglass sleeves typically have good electrical insulation properties. This makes them suitable for applications where both high temperatures and electrical insulation are required, such as in electrical wiring or industrial equipment.