GORE® Joint Sealant

100% ePTFE Sealing Cord for Large Steel Flanges

GORE® Joint Sealant

Joint Sealant, the first form-in-place gasket, was invented by Gore more than 40 years ago. It is a time-tested sealing solution for steel flanges with large diameters, rectangular or irregular shapes, and rough or pitted surfaces. When compressed, this soft, conformable cord forms a thin yet strong seal. It can also seal applications where available bolt loads are low.

Versatile GORE Joint Sealant is standard sealing material for many MRO (Maintenance, Repair and Operations) teams because it seals reliably – and because it’s easy and cost-effective to install. For most applications, just peel off the adhesive backing, apply to the surface, and overlap the ends.


100% expanded PTFE (polytetrafluoroethylene), with monodirectional strength.

This product is supplied with an adhesive backer only to aide in the product installation.

Temperature Range

-452°F to +600°F (-269°C to +315°C)

Chemical Resistance

Chemical resistance to all media pH 0-14, except molten alkali metals and elemental fluorine.

Operating Range

The maximum applicable pressure and temperature depend mainly on the equipment and installation.

Typical use: -76°F to 300°F (-60°C to 150°C); industrial full vacuum(1) to 14 psi (10 bar)

Shelf Life

ePTFE is not subject to aging and can be stored indefinitely. To ensure optimal adhesive function, GORE recommends use within two years of date of purchase when stored under normal(2) conditions.

(1) absolute pressure of 1 mmHg(Torr) = 133 Pa = 1.33 mbar = 0.019 psi
(2) 70°F (21°C) 50% Relative Humidity

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