with clarifying the meaning of waterproofing. No watch can be fully
waterproof, the term water proof in a watch is illegal to be used in the USA
since the 1960s. Water resistant is what is used today, and that can mean
from a splash in the water fountain to a dive of 600 meters. We are going to
make sure that watch, any watch, diver or not, lady's or men, can be water
resistant to a maximum possible. Watchmakers normally list in the dial or in
the back of the watch to how deep a watch can be submerged, this is noted in
bars or meters.
would ensure that a regular watch will be water resistant, better
than when it came out of the factory. We will return to diver's watches
later. Let's take an everyday watch from anybody - Fossil, Guess, even
Timex. We replaced the battery and now we want to be sure that this watch
will be as water tight as possible can be.
a list of tools you will need:
• G-S Crystal
Seiko 2-Part S-310 Crystal Adhesive or
Seiko S-314 U-V Adhesive or similar
Ultraviolet lamp (If you use an UV Adhesive)
• Gasket /
• Silicone 7
Waterproof Tester (optional)
Open the watch
O-ring or gasket and replace if it is needed. We place the new or old gasket
Gasket/O-Ring Lubricator, and leave it
there while we continue with the watch inspection.
Clean the back
of the watch carefully, use q-tips with silicone, and make sure that both
the watch back and watch case are free of any dirt.
stem and crown,
and clean the case tube ( if any) and the crown . If the crown is damaged,
it needs to be replaced.
the crown and the tube (the hole in the case), apply silicone in the crown
and parts of the stem. Make sure that the stem and crown are back in place
in the watch and are functional.
crystal of the watch and inspect. There should be no cracks or damage to the
watch crystal, if any are found
the watch crystal should be replaced.
If you replace the crystal, reset it with
Seiko 2-Part S-310 Crystal Adhesive,
Seiko S-314 U-V Adhesive, or similar to
provide maximum water tight seal.
Now that the
crystal is either clean or new, so we get our The Rocket Glue,
G-S Crystal Glue
and we go carefully around the crystal and the case, applying glue on the
edge. You only need to use a very small amount of this glue. The purpose of
this is only to seal little imperfections that either the crystal gasket or
the existing crystal glue may have. Let it dry.
Now Remove the
Gasket/O-Ring Lubricator, the gasket or
O-Ring should covered with silicone. Place
it either in the groove of the case, or in the back of the watch.
Apply more silicone to the back and the case and close the watch.
Set the watch
and look for any glue or silicone left over and clean it.
everything is done as mentioned, a watch water resistant to 3 Bar would
probably be resistant to 4 or 5 in control environmental A.K.A.
Bergeon Waterproof Tester.
what a diver's watch is and more important what is not a diver's watch: 99%
of Chronograph watches are not diver's watches even though they are sold as
if they were. Buttons are very difficult to reseal so the more functions
there are, the more places water can enter into the mechanism.
So if you work
on these watches, you should warn the customer that you can't be responsible
watches, like Casio watches with a metal back and four screws, may be water
resistant when they are sold, but when the battery is replaced, it is
impossible to reset the screws with the right pressure - plastic case and
metal screws are not a good combination. It becomes dramatically less water
resistant after the battery has been changed, therefore you should not
guarantee it will be water resistant after working on one.
A diver's watch
should have no functions. If it does have functions, all the buttons should
be screwed in, like the crown and also the back to prevent water leakage. So
we are going to change the battery and reseal the watch. The process is very
similar as done before, everything needs to be cleaned; everything needs to
be checked. All the buttons need to be removed and cleaned and lubricated
with silicone, all the gaskets.
Most of the
moisture in the watches comes in through the crown and the crystal, more so
in a diver's watch. We need to make sure that the
crown gaskets are in good condition, that the crown is screwed back in
the tube, the PPC gasket in the crystal is in good condition. The
rocket glue will fix little imperfections, but if the gasket is damaged, it
definitely needs to be replaced.
If you do
everything I have written, the
Bergeon Waterproof Tester
tool should prove that there is not a leak in the watch - and can be a
selling point tool or something to prove that your work was done right and
impress your customers.
Articles that may help you:
How to Replace a Watch Back Gasket
• How to Open a
How to Close a Watch Back
• How to
Measure a Watch Crown
• How to
Replace a Watch Crystal
How to Remove a Stem - Screw Type Stem Removal
How to Remove a Stem - Push Type Stem Removal