Teflon Based Gasket Sheeting
Seven PTFE sheet styles from general service commercial grade to cold flow resistant, microcellular, and multi-layer PTFE for aggressive chemicals and damaged flanges.
Anchor Seals Inc. can supply customized, pre-cut gaskets from any of the Teflon based sheeting materials listed below. PTFE is the material of choice where strong acids, caustics, and solvents attack fiber and rubber sheet, and the structured and multi-layer styles solve the cold flow and creep that limit conventional PTFE under bolt load.
See our specification table for Teflon gasket sheeting for service applications, maximum and continuous temperatures, PSIG, and compressibility.
Seven PTFE Styles
Why Teflon Based Sheet
Near universal chemical resistance for acids, caustics, and solvents that attack fiber and rubber sheet.
Style 1180 general service commercial grade PTFE for everyday chemical flanges.
Style 3504 minimizes the cold flow typical of skived and expanded PTFE.
Style 3510 holds bolt torque and withstands a wide range of chemicals for extended service life.
Style 3540 microcellular PTFE conforms to wavy, warped, pitted, or scratched flanges.
Style 3545 multi-layer PTFE seals under lower bolt load with a rigid core that resists creep.
Seven PTFE Sheet Styles
Specification TableTemperature, pressure, and compressibility for each style are on the specification table.
1180 General Service PTFE
General service commercial grade PTFE sheeting.
3500 PTFE Sheet
PTFE gasket sheeting. See the specification table for service application, temperature, and pressure ratings, or contact us for a recommendation.
3504 Cold Flow Resistant PTFE
Improved performance over conventional PTFE. A unique manufacturing process minimizes the cold flow problems typical with skived and expanded PTFE sheets.
3510 Torque Retaining PTFE
Excellent bolt torque retention. Withstands a wide range of chemicals for extended service life.
3594 PTFE Sheet
PTFE gasket sheeting. See the specification table for service application, temperature, and pressure ratings, or contact us for a recommendation.
3540 Microcellular PTFE
Pure microcellular PTFE similar to 3545, but without a rigid core. Ideal for wavy, warped, pitted, or scratched flanges.
3545 Multi-Layer PTFE
Higher compressibility PTFE. Outer layers seal under lower bolt load, and the compressible layers conform to surface irregularities on warped, pitted, or scratched flanges. The PTFE core reduces the cold flow and creep normally associated with conventional PTFE. Excellent chemical compatibility.
Every style listed can be supplied as sheet or cut to customized, pre-cut gaskets. Confirm limits for your specific media, temperature, and flange with an Anchor Seals Inc. representative.
Frequently Asked Questions
All Gasket SheetingWhat is cold flow and why does it matter for PTFE gaskets?
Cold flow, or creep, is the tendency of PTFE to slowly deform and thin out under sustained bolt load, which loosens the joint over time. Styles 3504, 3510, and 3545 are engineered to minimize it, so the gasket keeps its torque between maintenance intervals.
Which PTFE style should I use on a warped or scratched flange?
Style 3540 microcellular PTFE and Style 3545 multi-layer PTFE both conform to wavy, warped, pitted, or scratched flange faces. Choose 3545 when you also want a rigid core to limit creep, and 3540 when maximum conformability is the priority.
Is PTFE sheet suitable for all chemicals?
PTFE handles virtually all acids, bases, and solvents across the full pH range. The exceptions are molten alkali metals and elemental fluorine. Confirm temperature and pressure limits on the specification table.
Can you cut PTFE gaskets to my dimensions?
Yes. Every style on this page can be supplied as sheet or cut to customized, pre-cut gaskets in the Anchor Seals Inc. gasket shop from a drawing, a sample, or dimensions.
