Remove those vacuum rings from your quartz slabs with Extraclean Pro. This 1 quart container of solvent based cleaner is designed for removing greasy suction cup rings from quartz slabs. Extraclean Pro penetrates the pores of the material to remove grease that can make its way into the quartz. These rings can be difficult to remove without a product designed specifically for the purpose of eliminating these kinds of discolorations. One quart of Extra clean Pro covers approximately 200-300 square feet of material.