500 psi Mask Defogger Great for Scuba Divers

Easy even for the little lady to apply and works all day long. We snorkle the Pacific in SoCal and this stuff never lets us down. Smear it around the lens, rinse of the excess in the water, and be prepared to see without any distractions. I can literally rinse my mask untill dusk and still not need any more...clear that up for you?

This review is for the 500 psi Mask Defogger We used this almost daily while snorkeling in the Caribbean and it does the job! One 2 oz bottle will last two people a long time if you use just a little each time. We never had any fogging while using the 500 psi. It's a must have if you are diving or snorkeling!

I had bought new snorkle goggles for scuba diving. After using them a few times, they were instantly fogging up after a couple of minutes and driving me crazy! I used spit and toothpaste, but it didn't seem to make much of a difference. I was almost considering investing in a higher quality mask but thought I would try this first. After reading a lot of the other reviews, I decided to try this product and it worked really well! I was able to finally see clearly out of my mask!! The only downside and reason for 4 and not 5 stars is that I had to keep using it each time I used the goggles. Not the end of the world, but I hoped the effect would last a little longer. Would definitely recommend to keep your goggles from fogging up!

I’ve used 500 PSI Defogger for over 25+ years and I don’t know what I’d do without this little bottle of magic. After throughly cleaning a new mask with 500 PSI Cleaner, I apply a pea sized drop of 500 PSI Defogger to the interior of the glass and rinse with water before each dive, my mask will stay defogged for my entire dive or even longer. As far as Scuba Monkey Dive Center goes, they are fantastic. I did have a question for them which they answered immediately. Great Seller and I will do business with them again.

Product worked as described. I have used many other defogger's and this product seemed to last longer and not sting the eyes if some were to get in them. I have shared this product with other people that I dive with and they all fall in love with it. Definitely a must have in any dive bag.

This is the first time I think I've given a 1 star review. But it's pretty straight forward. The product did not work AT ALL. I live in southern California. The water temp in the beaches around here is 60F-70F during the summer. So it's not warm like in Hawaii or tropics. My masks have always gotten fogged up so I decided to give this a try. The product is a thick blue gel. Almost like a toothpaste. Directions are simple - rub on generously and rinse off with water. I did exactly that. Within 1-2 minutes: FOG. So I tried rubbing it on and letting it set for 10 minutes, then washing it off. Still got fog. 20 minutes -FOG. Thin or thick layer - FOG. I tried on different lenses - goggles, dive mask, a high end full face snorkel mask. All got fog. Tried glass and polycarbonate: FOG. Before I wrote this review, I had tried it on all types of stuff using different techniques (even different beaches!) and in the end I still got fog within 1-2 minutes. So for anyone that says this stuff works, I don't know what to tell you. Guess I got the ONE bad bottle out of the thousands produced. Sorry, this stuff just doesn't work.

I bought some of this at the local dive shop in Kailua-Kona, HI when I came for vacation years ago. Never thought too much of it... it worked. Well a couple years later we moved here and used it more often for diving and snorkeling. It wasn't until I ran out and used some other stuff (many different kinds) that I realized exactly how much I love this stuff. The dive shop no longer carried but luckily Amazon does! I really recommend it. The only downfall is when it dries it will leave a white residue... it will clean off, but it hides in the corners of my lens.

This is the 3rd time I have bought this product. It works better than any other I have bought. To me, it works as well as spit, which is what I went back to after trying other products. The bottle, needs to be changed, however. With every bottle I have bought, it has at sometime leaked into wherever I had stored it. The most recent purchase it had leaked into the package it was shipped in. The next time I purchase I will buy the carabineer version. You are paying more for the packaging but it is probably worth it based on how many applications I actually end up with.