Sichem S58

SICHEM® S58 is a multidirectionally modified PTFE gasket sheet, consisting of a core made of unfilled modified PTFE and microcellular PTFE layers on both sides. It is designed for applications where a more compressible and conformable material is required, even on large, worn, or corroded flanges. The bi-oriented multilayer structure and the inner rigid virgin PTFE core provide the material with excellent mechanical performance, superior resistance to hot creep, and optimal dimensional stability, even under low and prolonged loads.

High chemical resistance: compatible with acids and moderately basic fluids, solvents, and hydrocarbons. 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 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.