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This is a generic crystal gasket for the Rolex Milgauss 116400 (Green Crystal/anti‑magnetic watch), precisely sized to fit the original Rolex sapphire crystal. Made of high‑strength nylon and having passed a professional waterproof test, it creates a hermetic seal between the crystal and the case, restoring the watch‘s original 100‑meter water resistance.
Precise fit: Sized exactly for the original Rolex sapphire crystal of the Milgauss 116400, ensuring a perfect seal in the case groove.
Quality nylon material: Made of high‑strength nylon, offering excellent elasticity, aging resistance, and low compression set – superior to ordinary rubber gaskets.
Waterproof tested: Each batch is sample‑tested to withstand at least 3 bar (30m) of water pressure, and can meet the original 100m rating.
Compatibility: Specifically for Milgauss 116400 (green crystal or standard sapphire versions). Not compatible with other Rolex models (e.g., Submariner, GMT).
Repair value: The original crystal gasket hardens and loses elasticity over time, compromising water resistance. Replacing it with this nylon gasket is the most direct and cost‑effective solution.
Q1: Is the nylon gasket better than the original rubber gasket?
A: Nylon offers lower compression set and better aging resistance, maintaining a reliable seal over longer periods. Rolex itself uses nylon or PTFE gaskets in some models. This product meets or exceeds original specifications.
Q2: Does the gasket need grease during installation?
A: Yes. An ultra‑thin layer of waterproof silicone grease helps the gasket slide into place without twisting and improves the seal. Do not over‑grease, as excess can migrate to the dial or movement.
Q3: Can I use this gasket with a non‑original crystal?
A: Yes, as long as the aftermarket crystal has exactly the same outer diameter and edge profile as the original. This gasket is made to original specifications – any deviation may compromise the seal.
Q4: Why does the watch still fail a pressure test after replacing the gasket?
A: Possible causes: ① case groove not perfectly clean; ② crystal edge has burrs or scratches; ③ crystal was pressed unevenly, causing tilt; ④ case back or crown gaskets are also aged. Inspect each potential issue.
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