DIF Ultra, Gallon, Fast Acting Ready To Use Liquid Wallpaper Remover, Removes Wallpaper The Eco-Friendly Way, Fast Acting Formula Breaks Down Stubborn Adhesives To Give Your Walls A Fresh, Clean Start, Strips Wallpaper Fast, Penetration Works In 1-2 Minutes, Removes The Most Difficult Adhesives, Biodegradable, Non-Staining Formula, Leaves Walls Clean.