SAIT-PAK waterproof silicon carbide paper sanding sheets come in a variety of grits for a wide range of sanding and finishing applications. Sheets are constructed of the highest quality industrial paper for extra durability on all applications. Offers long life and non-loading sanding. Resin-over-resin construction for a strong bong that is resistant to heat and moisture. Used for body filler, paint, wood, fiberglass, and ferrous and non-ferrous metals.