O-ring gaskets

The O-ring watch gasket is the watchmaking reference for ensuring water resistance on a waterproof case. Its circular section offers optimal compression in the seat. Available in many diameters and thicknesses.

Features

  • Section: circular (O-ring).
  • Materials: nitrile, silicone.
  • Applications: case-back, crown, bezel.
  • Compatible with watchmaker silicone grease.

How to choose

  • Measure the inner diameter of the seat with a calliper.
  • Pick a gasket 0.1 mm smaller for compression.
  • Match the thickness to the seat depth.
  • Lubricate with a watchmaker silicone grease before fitting.

Follow our tutorial replace a case-back gasket for the full procedure.

FAQ

What is the difference with a flat gasket?

The O-ring offers better compression and suits deep seats. The flat gasket fits shallow snap-back cases.

Should an O-ring always be lubricated?

Yes. Silicone grease prevents pinching and extends sealing life.

O-ring gaskets

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