SeaLife O-Ring for Universal Flash: Replacement Guide

Quick answer

Replace the O-ring on your Sea Dragon Universal Flash with the genuine SeaLife O-Ring for Universal Flash (SL963). Follow the steps below to keep your flash sealed and avoid leaks.

Step-by-step replacement guide

1. 1. Remove the old O-ring: Turn off the flash and remove the battery. Gently lift the old O-ring out of its groove using a plastic O-ring removal tool or your fingertip. Do not use metal tools that could scratch the groove. Check the old O-ring for damage; if it's cracked or flattened, replacement is overdue.
2. 2. Clean the groove and O-ring: Wipe the O-ring groove and the O-ring itself with a lint-free cloth. Remove any sand, salt, or debris. If needed, use a small amount of fresh water, then dry thoroughly. Even a tiny grain of sand can break the seal — be thorough.
3. 3. Lubricate the new O-ring: Apply a thin layer of silicone grease (compatible with O-rings) to the new SeaLife O-Ring. Spread it evenly with your fingers. Do not use petroleum-based lubricants as they can damage the rubber. Too much grease can attract debris; a thin, even coat is best.
4. 4. Install the new O-ring: Place the lubricated O-ring into the groove, ensuring it sits evenly without twists or bunching. Press it gently into place all around. A twisted O-ring may not seal — run your finger around the groove to check for evenness.
5. 5. Test the seal: Reinstall the battery and close the flash. Perform a pressure test if possible, or at least check that the O-ring is visible and seated correctly around the entire seal surface. If the flash doesn't close smoothly, the O-ring may be pinched. Recheck before diving.

Product facts

• O-Ring for Sea Dragon Universal Flash: Replacement O-ring Gasket set for the Sea Dragon Universal Flash (SL963) This ensures a proper watertight seal for your flash, preventing leaks and protecting the electronics.