Greg Doyle
Registered
I'm going to update this message as I've learned that food grade silicone has solvents in it that will destroy the mask. It took some time, about a year, but what happened is that I started getting splits in the mask just below my nose. It happened on a liveaboard trip to the channel islands and my mask kept leaking. I couldn't find the problem and one of the others on the boat mentioned he'd seem me using silicone on my stache. He was able to show me barely visible cracks that we letting water in. Sure enough, I looked at some go-pro selfie video when I returned home and I could see water coming in below my nose.I trim my mustache slightly below my nose, and then apply food grade silicone to the stache. I used to use Vaseline, but my DM during my OW suggested that it will eventually destroy my mask because it's petroleum based. Since using the silicone, I've had no problems with leaking. I'm careful to not get any of the silicon on the lens and clean it well at the end of the day.
G
https://www.amazon.com/Grade-O-ring...sr=8-4&keywords=food+grade+silicone+lubricant
So, use vasoline if you do anything at all.....
G