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Sigma pairs the outstanding chemical resistance of PTFE with enhanced dimensional stability.

Developed for processes ranging from cryogenic temperatures to 500ºF (260ºC), and suitable for sealing virtually every chemical medium across the entire pH range (0-14). Sigma range materials contain non-stick properties that aid in an easy removal process after their usage to dramatically reduce the downtime on shutdown.
Now available in 80 x 80 sizes.

  • Sigma 500

    Sigma 500

    MATERIAL: Biaxially orientated PTFE containing hollow glass microspheres
    COLOR: Blue

    • 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
    • USP Class VI Certified
  • Sigma 511

    Sigma 511

    MATERIAL: Biaxially-orientated PTFE containing silica
    COLOR: Fawn

    • 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
  • Sigma 533

    Sigma 533

    MATERIAL: Biaxially orientated PTFE containing barium sulfate
    COLOR: Off white (pigment free)

    • 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
  • Sigma 588

    Sigma 588

    MATERIAL: Biaxially orientated PTFE
    COLOR: Off white (pigment free)

    • Highly conformable surface layers designed for glass-lined, FRP, ceramic, plastic and low bolt load applications
    • Modified PTFE inner core design to maximize sealability and prevent blow-out
    • FDA compliant
  • Sigma 600

    Sigma 600

    Developed specifically for petrochemical and chemical use. FDA compliant for both low and high bolt loads. Is non contaminating with lower creep an cold flow. A single gasket replacement for metallic and non-metallic flange applications.

    • Max Temperature: 500°F (260°C)
    • Max Pressure: 1235 psig (8.5 MPa)
    • ASME m: 1.4
    • ASME y: 1595 psi (11 MPa)
    • pH Range: 0–14
  • Fluoroseal Joint Sealant Tape

    Fluoroseal Joint Sealant Tape

    Fluoroseal joint sealant tape is manufactured from 100% expanded PTFE. The material offers good creep and cold flow resistance. Fluoroseal possesses excellent chemical resistance. It is also weather resistant and will not deteriorate with age.

    The sealant tape is supplied with a self adhesive strip and is available in a range of widths from 3mm (1/8”) to 25mm (1”). It conforms easily to irregular shapes and can be pushed into narrow openings effortlessly.

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