Sunmight Waterproof is made with quality water resistant paper backing for flexibility and outstanding finish. Sunmight Waterproof is a premium paper product made with high quality grain, latex paper and strong resin. This provides better performance and longer life. Special resin technology reduces possible curling problem during wet sanding operations.  Can be used for wet or dry sanding for all surfaces.  Sunmight Waterproof can be found at shopaci.com