Insta Patch is a quick peel-and-stick fix for black and grey water RV holding tanks. Bonds instantly to the tank, allowing you to refill immediately. Requires no cure time and no mess. Also repairs cracked shower pans, fender skirts or air conditioner shrouds. Includes 4 x 8 patch. Not for use on potable water tanks. | Specialty Recreation Inc Insta Patch Holding Tank Repair Kit in Black