Easily maintain maximum surface protection against stains . etches and soil build-up on granite countertops and other natural-stone surfaces. Granite Gold Sealer . an easy-to-apply spray-and-wipe stone sealer . creates a barrier to protect granite . marble and all other natural stone. Regularly check the integrity of the seal with an at-home water test. Pour water (about 3 inches in diameter) on the surface in several locations and let it sit for 30 minutes. If you see a dark mark or ring . the water is penetrating the stone and it’s time to reseal.