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Lost or damaged the gasket that seals your Garrett Sea Hunter or Infinium battery compartment? This replacement gasket restores the watertight seal that protects your detector's electronics during underwater hunts. Designed specifically for the Garrett Sea Hunter and Infinium models, it fits the battery housing precisely to prevent moisture intrusion at depths.
Why detectorists choose this gasket
- Maintain waterproof integrity: Factory-spec rubber gasket creates the seal Garrett engineered for saltwater and freshwater detecting.
- Direct-fit replacement: Matches the original battery-compartment gasket dimensions for the Sea Hunter and Infinium.
- Affordable insurance: A worn gasket risks flooding the battery housing; replacing it costs far less than repairing water damage.
- Quick swap: Remove the old gasket, clean the mating surface, press the new one into the groove, and you're back in the water.
When to replace your battery gasket
Inspect the gasket before every dive trip. If you see cracks, compression set (permanent flattening), or the rubber feels stiff rather than pliable, it's time for a new one. Even a small gap can let saltwater reach the battery contacts. Replace the gasket when you see cracks, compression set, or stiffness, and immediately if you notice moisture inside the compartment after a hunt.
Compatibility
This gasket fits the battery housing on the Garrett Sea Hunter (original and Mark II versions) and the Garrett Infinium. It does not fit the AT Pro, AT Max, or other land-based Garrett models. If you own a Garrett metal detector and aren't sure which gasket you need, check the part number molded into your existing gasket or contact our team.
Specifications
- Part Number: G402
- Compatibility: Garrett Sea Hunter, Garrett Infinium
- Material: Rubber
- Function: Battery compartment seal
Why Buy from Serious Detecting
Serious Detecting is an authorized Garrett dealer, so you're getting genuine Garrett parts backed by the manufacturer's warranty. We offer free shipping on all orders, a 30-day return policy if the gasket doesn't fit your detector, and our price-match guarantee ensures you're paying a fair price. Our team has hunted with the Sea Hunter in the Gulf and knows how critical a good seal is, order with confidence.
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