Did you know that anytime you open your
watch that you should check the quality of your back gasket? Most watch
leaks come from a leaking back gasket. Learn how to replace your watch
gasket with this helpful guide.
- A pair of tweezers
- A replacement gasket
- And silicone sealant or grease
First, before you order your new
replacement gasket, you must measure the outside diameter of the back to
ensure the gasket will fit tightly. Take the watch case back and place it
upside down on a flat surface.
Before measuring the gasket, you will need to remove the old gasket if it
has not already broken and fallen off on its own. Remove the old gasket by
pulling the gasket away from the back with your tweezers and sliding it off
Then, using a digital gauge to get accurate measurement, measure the outside
diameter of the inside lip on the gasket, where the old gasket was. This
will get you the diameter you need for your new gasket.
Next, you must measure for the thickness of
the gasket. Using the opposite end of the digital gauge, measure the depth
of the inside lip of the back from the bottom edge to where the gasket
Once you have these two measurements, you
can order the new gasket with confidence knowing it will be the right size
for your watch case back.
NOTE: Be sure to order a gasket that is
point-one millimeters smaller than the measured diameter to ensure a tight
When you have your new gasket, before you
can put it on the watch case back, you must lubricate it to ensure a strong
and tight seal.
Place the new gasket in the Silicone
Sealant box, close the box and twist the lid to ensure the gasket is
liberally coated with grease. This will extend the life of your gasket and
improve the watch case’s seal keeping out dirt and moisture.
Now you are ready to place the gasket: Slip
the gasket over on side of the case back lip, hold it in place with your
thumb. Then, using your index finger and thumb of your other hand, stretch
the gasket slightly to allow it to slip around the rest of the case back lip
and fit into place.
Once your gasket it is place, but before
you can close your watch case back you need to be sure the watch is dry
inside. This is particularly important if there was any moisture in
the watch when you started to replace the gasket.
Either way, just to be sure, it is best to
let the watch case dry out before you close it. Place the watch case under a
light bulb to dry.
Once you are satisfied that your watch
case is dry, firmly close the watch case back to the watch case to create a
NOTE: This does not mean that your
watch will be waterproof, there are many other watch gaskets used to create
a waterproof watch.
For more information about how to repair
watches, visit our Learning Center for more How To help.
Other Articles that may help you:
Waterproof a Watch
How to Open a Watch Back
• How to Close a Watch Back
How to Replace a Watch Movement
How to Replace a Watch Crystal