High compressibility and low compression set over a wide temperature range. Good acoustic and thermal insulation properties. Suitable for long term continuous use from -60 to 400oF (-50 to 200oC) and for intermittent use from -100 to 500oF (-75 to 260oC) UL recognition Specification: Thickness:4mm Length*width: 500*500mm Application: Thermal insulation; high and low temperature acoustic insulation High and low temperature gaskets and seals NOTE: Size can be optional by customers We also provide silicone sponge strip and natural rubber sponge sheet