Sealing Reference

Design Guides

  • Seal Design Guide by Apple Rubber - PDF
  • O-ring Design Guide by Parker - PDF
    • See 4-18 for gland dimensions for standard static face seals.
  • Rotary Seal Design Guide by Parker - PDF



Description of O-rings

Rotary seals

Descriptions of rotary seals.

  • Video Overview of Rotary Lip Seals - Trelleborg
  • Friction torque of a rotary shaft lip type seal - a comparison between test results and finite element simulation - PDF (487.9 KB)
  • Rotary Dynamic Seals by Georgia Institute of Technology PDF (2.5 MB)
  • On the sealing mechanism of radial lip seals by Tribology International - PDF (561.0 KB)
  • Dynamic Sealing Principles by NASA PDF (9.4 MB)
  • Radial lip seals efficiency under dynamic operating conditions by International Conference on Tribology PDF (408.8 KB)
  • Detailed surface analysis of lip seal elastomers ran against shafts manufactured with triangular cavities - PDF (6.7 MB)
  • Thermal-Mechanical Coupled FE Analysis for Rotary Shaft Seals - PDF (3.6 MB)
  • Mechanical seal performance and related calculations - PDF (2.1 MB)
  • Numerical Investigation of the Effect of Radial Lip Seal Geometry on Sealing Performance - PDF (1.1 MB)

Bearing Isolators

Description of bearing isolators


Description of gaskets

Custom gaskets

You can injection mold complex gasket shapes in silicone rubber if your enclosure isn’t round or conforming to off-the-shelf solutions.

:warning: CAUTION: Polishing a mold with a small gasket cross-section may cause flash.
You may be tempted to specify a polish on the gasket mold for sealing performance. If the gasket cross-section is smaller than your shop’s polishing tools, you may round the edges along the parting line, increasing flash.



Lubrication is typical in seal installations.

  • Improves seating.
  • Reduces pinching.
  • Helps with installing complex and delicate geometries by allowing the gasket to stick.
  • Swells the seal to improve sealing performance.

Chemical Compatibility Guides

  • Lubrication Compatibility Chart by Parker - PDF
  • Lubrication Compatibility Chart by Apple Rubber- PDF

:warning: CAUTION: Most silicone lubricants are not compatible with silicone rubber.
They will lead to rapid degradation. Instead use a Barium-based grease or other purpose engineered formulation. McMaster sells a Barium grease compatible with silicone.


See Also