Precautions on Use (continued)
Notes on the Waterproof Gasket•Check that there are no scratches or cracks on the waterproof gasket as they may allow water to leak in. If there are scratches or cracks, replace the damaged waterproof gasket with a new one.
Do not remove the waterproof gasket with a metal tool or a tool with a sharp point.
Groove | Groove |
•After checking that there are no cracks or dust on the waterproof gasket, coat it slightly with the supplied grease using your finger. This will prevent wearing.
While applying the grease, recheck for cracks or dust. Never use cloth or paper for greasing as the fibers may cling.
Do not use any type of grease other than that supplied, as it may damage the waterproof gasket.
•Put the waterproof gasket in the grooves evenly, with the tapering side up. Never twist it.
Tapering side up 
Groove
•The useful life of the waterproof gasket depends upon the maintenance and the frequency of use, but we recommend changing it once a year. To replace the waterproof gasket, please consult the nearest Sony dealer. Be sure to check the water leakage after replacing the waterproof gasket.
Checking for the water leakage after replacing the waterproof gasketCheck for the water leakage before installing the video camera recorder. Close the sports pack without installing the video camera recorder, and keep the sports pack submerged under water at a depth of about 15 cm (6 inches) for about 3 minutes and then check for water leakage.