Scotchgard protector is a revolutionary stain repellent that repels spills, resists soils and blocks stains to protect carpet. BISSELL upright carpet cleaning formulas that include Scotchgard have the substance formulated in, so as you clean your carpet you can also protect it from becoming stained in the future. This stain-protecting substance pushes liquids away from the base of carpet fibers. This means that when you have a spill, the liquid will stay at the surface longer so you have time to clean it up before the carpet is seriously damaged.