do you need to seal new marble counters
Two Methods: Marble Cleaning Techniques Application of Sealers. To protect your marble countertop from becoming stained, scratched, and permanently damaged by harmful chemicals, you must clean and seal the marble on a routine basis.. Pour the sealer directly onto the surface of the marble countertop. 1  If your countertop has a large surface area, you may want to treat small sections once at a time to make the sealing process easier or more efficient.