	SIGMA 500 - Sheet material with higher compression specifically formulated for use on glass lined, plastic or ceramic flanges. Also suitable for use on flanges which are non-parallel, damaged or distorted. Compatible with acids and alkalis at all but the highest concentrations. Enhanced compressibility is achieved by the incorporation of hollow glass mirospheres as the inorganic filler.
	SIGMA 511 - Standard compression sheet material reinforced with a silica filler. Intended for use with concentrated acids (except hydrofluoric acid) and with most general agressive chemicals: also suitable for medium concentrations of alkalis.
	SIGMA 522 - These products have rigid cores of biaxially reinforced PTFE with soft, conformable surface layers of pure PTFE. Designed for use where low bolt loading is available.
	SIGMA 533 - Standard compression sheet material reinforced with barytes (barium sulphate) filler. SIGMA 533 is the preferred choice for sealing concentrated alkalis and is also compatible with Aqueous Hydrofluoric Acid. Restricted resistance to concentrated mineral acids.
	SIGMA 588 - Most compressible PTFE sheet without filler; biaxially orientated PTFE core with soft surfaces for higher, controlled compressibility.
	SIGMA 599 - Specially formulated PTFE sheet with hollow glass microspheres for higher compression.
	SIGMA 600 - Designed to replace older conventional gasket technologies including skived PTFE, semi-restructured PTFE, and restructured PTFE. Its unique composition and uniform tensile strength make it a single gasket replacement material choice for both metallic and non-metallic flange applications like glass lined, ceramic, plastic or metal.