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Semi-rigid material.
A semi-rigid laminated material manufactured from high purity exfoliated graphite reinforced with Nickel or Stainless foil or tanged stainless steel. It is suitable for sealing against steam and most other media with the exception of strongly oxidising reagents. It is recommended for use at 350ºC and for pressures up to 2900psi. General material grades available from SPG include:
SPG1
A semi-rigid laminated graphite material manufactured by a process which bonds two layers of graphite foil to a thin nickel reinforcement layer. The material contains no binder, respirable fibre or other additive and is totally non- toxic.

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In accordance with the requirements of BS7531 Grade Y.
For use with water, steam and gases at temperatures up to 200ºC and for oil, solvents and inert liquids at temperatures up to350ºC PermaniteSF2400 Klingersil C4400
Novus Supra
Klingersil C4324

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Premium Grades


In accordance with the requirements of BS 7531 grade X.
For use with water, steam and gases at temperatures up to 250ºC and for oil, solvents and inert liquids at temperatures up to 440ºC.
Permanite SF3300
Klingersil C4430
Novus Graftec

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800 Series – This revolutionary material, comprised of chemically and thermally exfoliated vermiculite, simulated the structure of exfoliated graphite, with one notable exception – it maintained integrity through a wide range of extreme temperatures.
894 Packing™
Critical service packing made from expanded vermiculite foil and Inconel wire
high temperature, high pressure sealing
Cryogenics to 1900ºF/1050ºC

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800 Series – This revolutionary material, comprised of chemically and thermally exfoliated vermiculite, simulated the structure of exfoliated graphite, with one notable exception – it maintained integrity through a wide range of extreme temperatures.
845 Flexpro™ (kammprofile) facing
- High temperature facing material for kammprofile gaskets
- Cryogenics to 1800ºF/982ºC
- Class 150 to 2500

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800 Series – This revolutionary material, comprised of chemically and thermally exfoliated vermiculite, simulated the structure of exfoliated graphite, with one notable exception – it maintained integrity through a wide range of extreme temperatures.
815 Tanged Sheet
- High temperature sheet reinforced with a 0.004” 316 stainless steel tanged core
- Cryogenics to 1800ºF / 982ºC
- Available in thicknesses of 1/32”, 1/16”, and 1/8” in meter by meter (standard) and 60” x 60” sheet
- Class 150 to 300

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Thermiculite – The introduction of Thermiculite® Critical Service Series gasket material available in Tanged sheet – and later in Spiral Wound and Flexpro™ (Kammprofile) Facing styles.

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Sigma 533
Standard compressibility
Ideal for sealing food, pharmaceutical and other non-contamination applications
Strong alkaline solutions to other general chemicals
Aqueous hydrofluoric acid below 49%
Not suitable for sealing molten alkali metals or fluorine gas
MATERIAL : biaxially orientated
PTFE containing barium sulfate
COLOR: Off white (pigment free)

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Sigma 511
Standard compressibility
Strong acids (except hydrofluoric) to general chemicals
can be used for all concentrations of sulfuric acid
Not suitable for molten alkali metals, fluorine gas or hydrogen fluoride
WRAS approved for hot and cold potable water services
MATERIAL: biaxially-orientated PTFE containing silica
COLOR: Fawn

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Sigma 500
Enhanced compressibility for low bolt loads
Improved flexibility over conventional calendered and graphite sheets
Moderate concentrations of acids & caustics, chlorine and hydrogen peroxide can be used for all concentrations of sulfuric acid.
WRAS approved for hot and cold potable water services
MATERIAL : biaxially orientated PTFE containing hollow glass microspheres
COLOR: Blue

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