Re: Surefire 6P isn\'t waterproof? Gotta be...
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Xrunner said:
The secret to keeping Surefires water resistant it to keep the o-rings and threads lubed up and in good shape. IIRC the only light that Surefire sold as waterproof to the general public was the 6PSN. There were also some M3s that have been tested and certified (if that is the right work) but I don't know if these were sold to the public. Also, for a while Surefire would test your light for a couple of hundred $. Another important factor in if your light is really water resistant is the tolerances of the individual pieces. While all lights meet general standards, I believe the somewhat waterproof ones met tighter standards.
One of the mail problems with using Surefires (such as the M3) at depth is you will get to a certain point where the water pressure will activate the tailswitch and you won't be able to turn off the light.
To sum things up, as long as you don't take your Surefire swimming or diving with you should be good to go (and some people do but they know the risks). I would recommend not taking LEDs underwater because of increased risk of damage to the electronics if they did get wet, but I never hesitate to use any of my Surefires because of the weather conditions or the like… and if it happens to fall in the water during use, I take it out, dry it off, and make sure to rinse it with fresh water when I get home. Hope this helps.
-Mike
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The above quote was taken from
here. You can find some more info on waterproofness (if that's a word /ubbthreads/images/graemlins/smile.gif) in that thread.
-Mike