What products does KLINGSPOR offer in waterproof sandpaper? 
Please look at KLINGSPOR's grit chart, located on the back page of our catalog. This grit chart will list all of our products that have been chemically treated to be waterproof ( i.e.they will have a WP or “waterproof” designation on backing) and all our polyester backed products which are inherently waterproof. Please check your grit charts.