Asbestos Sealing Gaskets for gauge glass is also named compressed asbestos rubber gasket, asbestos cushion or asbestos cushion joint, they are made from high pressure compressed asbestos fibre rubber sheets resistant to temperatures up to 450 °C and the pressure to 150 bar.

Asbestos gaskets is a traditional material for the gauge glass sealing,which is a general purpose gasket material suitable for service in hot water, mild acids, alkalines, and inert gases. It is a cheap sealing gasket material. Now most of western countries ban the use of asbestos products, but in some developing countries, this product is still used in large quantities.