I have since 97 and never had a problem with leaks, but you're correct silicone based o-ring grease is best and I'm sure recommendedDon't use vaseline or other petroleum based products on o-ring seals.
Ya know what I meant.......geez louise........pickyThe dessicant bags are generally filled with Silica, not SILCON
The ones with a screw-on top are great for small items. I have a few in my tool box.They are not just submersible - they can withstand significant internal pressure too. When the vacuum is too great, they will collapse some rather than leak. The wide mouth versions will take cell phones and small GPSs.
Don't use vaseline or other petroleum based products on o-ring seals. They should be lubed with a silicone based o-ring grease... not vaseline. Vaseline will often attack the material the o-ring is made of, and make any leaks worse, not better.
The dessicant bags are generally filled with Silica, not SILCON
Lo, I think you're expectations exceeds design...
If you are having problems with normal water intrusion check the seal for damage of any kind...
Those "waterproof" handhelds are no more waterproof than a Pelican case. This doesn't mean that a Pelican case or a waterproof handheld isn't better than nothing -- it is. That's why I use both.Well, considering that most marine instruments are only waterproof to the same standard, maybe they shouldn't be used on boats????
My Pelican cases are guaranteed in writing to be submersible to a three foot depth for 30 minutes. That's pretty good, and I will continue to use them, but I would like something better if available.Pelican cases are designed to protect gear from normal conditions of transport. Unless you're a merman, and live on the bottom of the ocean... submersing the case on a regular basis is not considered normal transport. BTW, I've used Pelican cases for many years, and they're quite good at what they're designed to do. Water-tight is not the same thing as submersible.
you sound like you know what you're talking about, so I can only add the obvious, you have a bad case(s), but I did carry two cases to the boat in a driving rain storm and ended up regretting it. I found no damage to the seal on either. So yes, I guess my expectations exceeded design.