High temperature sealants

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Synthetic fibre sheets

The first soft sealing product which can cope with high-temperatures and has exceptional chemical resistance.

As the name would suggest, these sealants are ideal for the replacement of existing sealing products and for new applications. These unique sealants are characterised by the versatility of use in high-temperature and high-pressure environments, their suitability for aggressive media, and in conditions where corrosion and oxidation are prevalent. In addition, Thermiculite is ideal for applications where hot steam is present.

A major supplier of these sealants and gaskets is Flexitallic. They have developed a soft sealing product called Thermiculite. Thermiculite can be applied in a diversity of ways:

In sheet form, Thermiculite 715 is used for gasket rings which have a combination of vermiculite, aramid fibre and nitrile rubber.
Maximum temperature range of 540 ⁰C
Used widely in situations where high-chemical resistance is required and suitable for steam, acids and alkalis
Available in thicknesses from 0.8 to 3.2 mm
In sheet form with a metal core, Thermiculite 815 is used for vermiculite gasket rings with a stainless steel tanged core
Maximum temperature range of 1050 ⁰C
Maximum pressure 200 bar
Can be applied in superheated high-pressure steam, gas and exhaust systems
Fire safe in conformity with API 607
Available in thicknesses of 1 to 3 mm
As a spiral-wound sealant, Thermiculite 835, with a standard stainless steel 316L and Thermiculite as filler, this gasket is suitable in high-pressure, high-temperature and corrosive conditions
Maximum temperature range of 980 ⁰C
Suited to applications involving extremes of thermal or mechanical cycling, superheated steam, strong oxidising media at high temperatures
Maximum pressure 150 bar
Fire-safe in conformity with API 6FB
Available in various styles, with or without an inner and/or outer ring
As a Kammprofile gasket, Thermiculite 845, with a standard stainless steel 316L core and Thermiculite as facing
Maximum temperature range of 1050 ⁰C
Combines ideally the benefits of kammprofile sealing with a high-quality, oxidation-resistant core. Ideal for heat exchangers
Maximum pressure 400 bar
Available in thicknesses of 2 to 5 mm
As a laminated sheet, Thermiculite 896 has an ultra-thin stainless steel core with vermiculite and steatite facing
Maximum temperature range of 1000 ⁰C
Ideally suited in environments where high gas densities are required
High chemical resistance
Maximum pressure 150 bar
TA-Luft certified low emission sealant
Available in a thickness of 1 mm
As compression packing, Thermiculite 894 is ideally suited for use as a valve stem sealant with Inconel 600 wire and Thermiculite strip to produce a square-section sealing ring
Maximum temperature range of 1050 ⁰C
Suitable for high temperatures
Offers excellent resistance to aggressive media
pH range 0-14
Available in the following thicknesses: 5, 6, 6.5, 8, 10, 12, 12.5, 15 and 19 mm
Standard lengths of 8 m and 20 m for small thicknesses

Most gaskets are made available in compliance with various standards, such as ASME, ANSI, EN and DIN.

For more information, please refer to our datasheets which can easily be downloaded.