How to Seal Sandstone Countertops

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Sandstone countertops must be sealed immediately following installation. The porosity of the sandstone requires routine sealing. When choosing a sealant for your sandstone countertops, choose an impregnating sealer that is designed for sandstone and other porous countertops.

Clean your sandstone countertops and allow them to dry for 24 hours before applying the sealer. Apply the sealer following the manufacturer's directions. You will need to apply multiple coats of sealer to reduce the porosity of the stone.

Impregnating sealers work by soaking into the natural stone surface and filling the pores of the stone with a sealer. Sealers are made by suspending resin in either a solvent or water-based delivery system. As the water or solvent evaporates, the resin hardens and fills up the pores in the sandstone to slow down the absorption rate of the stone.

The final coat of sealer should be allowed to dry for 48 to 72 hours before you begin using your countertops. Typically, after 24 hours, light usage is permitted. however, it can take up to a week before the countertop sealant fully cures.

You should not depend on a topical sealer to fully protect your sandstone countertops. however, topical sealers can add a layer of protection to adequately sealed sandstone. For best results, spray your sandstone countertops down with a topical sealer once a week and buff to a beautiful finish.

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