Temperature – Gasket material must withstand entire design temperature range of the fluid it handles. Pressure – Gasket material must withstand entire design pressure range of the fluid it handles. Corrosion resistance – Gasket material should not corrode when it comes in contact with the fluid it handles or by the environmental exposure. Types of fluid – Gasket material should be capable of dealing with different type of fluids if installed in line that handles more than one types of fluids. Other products you may also interested: 1. ptfe skived sheet 2.ptfe gasket 3.ptfe thread seal tape 4.pure ptfe sheet 5.ptfe plates