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Home  »  Specialty Closures Overview  »  Liners
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Liners are used in various Life Science segments, particularly in applications where low extractables and seal integrity are needed for container closures such as environmental testing and chromatography testing.

We offer a wide range of thicknesses, colors and face materials for liners. Unlike our competitors, we are the producer of PTFE film, which allows us complete control of the material quality and characteristics. All liners are measured continuously during manufacture. Additionally, we have over 100 different dies in house to produce liners in any diameter. We also produce slit liners in multiple styles—including straight, cross and star—to allow for easier needle penetration.

Our liner materials are offered in the following configurations:
  • PTFE face/ silicone backing
  • PTFE face/butyl backing
  • PTFE face/F217 backing 
  • Polyethylene foam
  • PTFE face/EPDM backing

The thickness, durometer and color can be custom manufactured and configured to meet individualized needs. 
Market examples for specialized liners include:

Liners for Environmental Applications
.125" thick, ultra-low bleed silicone with a .005" or .010" PTFE face, 30-60 durometer hardness
  • PTFE is chemically inert
  • Ultra-pure to the parts per trillion
  • Provide a tight seal
  • Meet USP Class VI standards
  • High-quality silicone reduces sticking on injection port

Chromatography Injection Liners
.040" thick pre-slit silicone liner, with PTFE face in a choice of red, blue, yellow, white or natural coloration 
  • Low durometer for easy needle insertion and increased resistance to coring
  • Pre-slit liner releases vacuum pressure within vial after a large sample is extracted
  • Colors enable easy identification of samples

Saint-Gobain can manufacture liners in any diameter, color, thickness and durometer, with or without a PTFE face. See our Closure Configuration Station to assemble your ideal application-specific liner solution.

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