GLAZE Granite & Marble Tr. LLC | Blog

Water Proofing & Sealing of Marble


Mr. Amir Abdul Gani

Sealer is a liquid form of product that is used to protect and enhance the life of your marble. It is a treatment that is usually applied on the top, sides, and bottom of marble. Marble can absorb any fluid coming from the top and bottom surfaces if it is not properly sealed. All natural stones be it marble, granite is porous to some extent, depending on the stone’s natural characteristics. Hence all six-side sealing for all natural stones is necessary. Some may recommend stone fixing without sealing but we at GLAZE recommend sealing of every natural stone.

Marble sealer is a solution that contains polymers, resins, siloxanes, silanes, and other substances designed to form a protective layer that acts as a shield against foreign liquid, moisture, spills, and stains by reducing its absorbency and making it less prone to staining.

Sealers are available in two formulations such as solvent-based and water-based impregnating or topical sealers. Solvent-based sealers contain chemicals that evaporate, leaving behind a protective layer of marble. Water-based sealers use water as the primary carrier for the sealing agents. Impregnating sealers penetrate the marble surface to provide lasting protection within. 

Before applying the marble sealer, the surface must be dry and free of dust and dirt. The sealer is then applied with the help of a brush, roller, sponge, sprayer, etc., following the sealer manufacturer’s application instructions.

We at GLAZE always recommend applying 2 coats or more depending on the nature of the marble and wiping off any excess sealer before it dries. After application, the sealer needs time to cure and bond with the marble.

Sealer help prevents liquids from getting absorbed into the stone, reducing the risk of stains caused by spills of water, oil, juice, coffee, wine, or any other acidic substances.

There are contractors using sand cement mixture for fixing natural stones as this is less pricy than using adhesives. Sand used in the traditional method must be of high quality, sand color, and quality can be the reason for generating stains from the bottom of the stone. The water mixing ratio is fixed while using adhesives whereas in the sand cement method water quantity can be more or less, to stop water absorption and infiltration into the marble, bottom waterproofing is more recommended than using just a sealer. For such past fixing method stone waterproofing is more protective than a sealer. Stone waterproofing is available in two components (powder + liquid) which can be applied on the stone bottom surface.

Advantages of Waterproofing & Sealing

Prevent moisture seepage: While fixing natural stone using traditional methods or adhesive, it is very important to use sealer and waterproofing for the top and bottom surface as full protection from moisture seepage and water infiltration.

Prevents Stains: Marble is a less porous stone, liquids can penetrate in the pores of stone if not cleaned on time, and once the liquid penetrates the marble, a stain could occur. Therefore, a marble sealer helps prevent this.

Faster Cleaning and maintained surface: Sealer application could make it easier to clean floors and countertops. Dirt and other fluids can be easily cleaned away because they will not get absorbed into the surface. It is often easier to clean once you are done with cooking and any other process creating your marble surface dirty, and you will not have to do much scrubbing. Therefore, if you want to make your cleaning work more manageable, you should consider sealing that marble. Please note that even with a sealer, it’s important to clean up spills speedily to avoid potential damage.

Regular maintenance and frequency of sealer reapplication may vary depending on the type of marble, the sealer used, and the amount of wear and exposure the surface experiences. Reapplication of marble sealer is necessary to keep the protective layer intact and long-lasting protection of your marble.

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