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PTFE Soft Coated Fiberglass Gasket Sealing Fabrics
Gasket Sealing Fabrics
550°F / 287°C Continuous Exposure: Higher Intermittent
FlameShield™ high temperature, heat resistant and chemical resistant fabric offers the advantage of a non-asbestos material with a higher temperature range and with excellent resistance to almost all solvents, caustics and acids. This fabric makes an excellent gasket material and is a milk white color.
The base fiberglass fabric is rated to 1000°F / 537°C, while the PTFE (Teflon) coating melting point is 620°F / 327°C.
Available in 5 weights / thicknesses, in roll widths of 40" and 60", and in roll lengths of 50 yards.
The PTFE is applied to the fabric by dipping the fabric through an immersion tank of liquid PTFE dispersion. The fabric is then air dried as it leaves the dip tank. The result is a PTFE coating on the fabric which is soft, robust and flexible; however, it can be abrasively removed from the fabric with aggressive fingernail scraping, resulting in a thinner and thinner layer of ptfe remaining with each pass.
The coating follows the contours of the fabric, and the weave of the fabric remains prominent, however, the PTFE causes the yarns to be sealed and the small gaps between the yarns filled, resulting in an almost totally air-tight / liquid-tight fabric.