25% Glass Teflon

Polytetrafluoroethylene (PTFE) is a popular fluoropolymer, which is well-known for its variety of applications. This material is reinforced with glass fiber at percentage varying between 5-40% to improve its mechanical properties. SSP Manufacturing, Inc. provides seals made from 75% virgin PTFE, and 25% glass filled fiber. Our 25% glass-Teflon seals are perfect for conditions where regular elastomeric seals fail to meet thermal, chemical, and wear related requirements.

Benefits of 25% Glass Teflon Material Seals

The following benefits make 25% glass filled PTFE ideal for various industrial applications:

  • The 25% glass-fiber reinforced material has the lowest coefficient of friction, and maintains its self-lubricating properties in dry environments.
  • The seals made from this material will not swell due to moisture absorption, and can easily withstand daily wear and tear.
  • The seals receive their excellent electrical properties due to their material of construction. These properties include low dielectric constant, high dielectric strength, as well as high electrical resistance.
  • The glass filled PTFE material can resist most chemicals in industrial applications, as well as fluorine, alkali metals, oxygen difluoride, etc. It is not recommended for bearing applications where it may come in contact with hydrofluoric acid.
  • The seals can withstand temperatures up to 370°C, which makes them ideal for several high heat applications.
  • These seals have reduced stick-slip, and provide long-term performance.
  • The seals have low creep performance at high and low temperatures.


SSP Manufacturing, Inc.

Phone: 1-908-852-3125     Email: gm@sspseals.com

TECHNICAL DATA SHEET for 25 Glass Billet Grade - Low Flow

Composition byWeight % and Filler Description

75% Virgin PTFE

25% +/- 2% E Glass Fiber

Specific Gravity ASTM D 4745 ~ 2.20 ± 0.05
Tensile Strength* ASTM D 4745 Mpa 18
Elongation* ASTM D 4745 % 200
Filler Content Poly-Smith % 25 ± 2
Hardness ASTM D 2240 Shore D 55 - 65
Shrinkage ASTM D 4745 % 1.6 ± 1.0
* cross direction
Recommended Molding Pressure 35 - 40 Mpa
Max Sintering Temperature 370ºC

Seal Offerings by SSP

We can provide the following types of seals made from 25% glass-Teflon:

  • Food Grade Seals
  • Water-cut Gaskets
  • O-Rings
  • Industrial Seals

To know more about glass filled PTFE 25% seals or Teflon 15% glass filled PTFE, or other reinforced PTFE seals, please contact us at the earliest.

This material is FDA Approved (FDA CFR 21-177.2600 Compliant)
FDA Approved Seals & Gaskets