500 PSI Mask Scrub is specially formulated to clean new and old mask lenses prior to defogging. 500 PSI Mask Scrub gently removes mold release from manufacturing processes found on new masks that can prevent defogging solutions to not work properly. Removal of the mold release assures that your mask defogger will work properly. 

Periodically use mask scrub to remove residue buildup on older masks for a crystal clear lenses. Easy to use just apply a small amount to the dry interior lens surface and rub in firmly using your fingers, then just rinse in fresh water to clean. 500 PSI Mask Scrub comes in a convenient 1 oz (30 ml) applicator.