500psi was founded in 1994 with it's primary product being our proprietary blend of Mask Defog which has a long and loyal following. Along the way 500psi has developed other product lines that have also proved to be popular products in the scuba diving industry. These include our Mask Scrub formulation, our WetSuit & BC Wash and Stink Guard odor control formula. We also have a very effective Salt Removal treatment, a Wet/Dry Suit Slide, Silicone Lubricants and Neoprene Cements. 500psi also will add your logo onto our 2oz products for no additional setup charge. In doing this over the years we have a rather large collection of unique Dive Shop logos from all over the world. We are committed to producing some of the finest Scuba Equipment Care products in the industry.