Sichem S66

SICHEM® S66 is a flat gasket sheet made of modified microcellular PTFE, biaxially oriented and reinforced with a 316L stainless steel insert. Its high compressibility makes it suitable for use on irregular or damaged surfaces of both metallic and non-metallic flanges, even at low bolt loads. The 316L stainless steel insert also makes it suitable for high-pressure applications. The multidirectional structure provides the material with excellent mechanical performance, superior resistance to hot creep, and optimal dimensional stability, even under low loads.

High chemical resistance: compatible with a wide range of chemicals, including acids and solvents. PTFE is not compatible with: bromine trifluoride, chlorine trifluoride, fluorine dioxide, hydrogen fluoride, molten alkali metals, elemental lithium, elemental potassium, and elemental sodium. For compatibility with the filler materials used in the Sichem range, please refer to the Chemical Compatibility List.

Superior mechanical stability: the biaxial orientation improves resistance to creep and permanent deformation.

Excellent machinability: easy to punch and CNC cut, ensuring precision even for complex geometries.

Low permeability coefficient: ideal for applications requiring long-term tight sealing.

Operating temperature: from –200°C to +260°C, depending on the type of fluid and the applied load.