Sealers for Natural Stone and Grout

To seal is to protect, and porous natural stone and cement-based grout need to be sealed if you want to extend their lifetimes and keep them clean and beautiful.

If I seal my stone and grout, is it 100% protected and stain-proof?

Hand wiping spilled wine off of tile floor

No. A sealer is not a solid, plastic-like barrier that keeps out all elements. Think of sealer as a breathable layer of protection, like wearing a jacket into harsh weather. If you go out in a Seattle downpour without wearing a jacket, you'll get cold and wet very fast. If you wear a good coat, you'll still get wet eventually, but it will take a lot longer for the water to soak through your coat and get to you. Sealers are similar: a layer of protection against outside damage, but not impenetrable.

Sealers provide a good barrier against stains, but if (for example) you let spilled grape juice or vinegar sit on your granite countertops or travertine floors long enough, they will eat through the seal and damage/stain your stone. Sealers do not protect against chemical damage.

Why should I seal my natural stone before grouting?

Cement-based grout has pigments that can sink into the pores of your stone and stain it. Below are several Philadelphia Travertine samples that were grouted before they were sealed. You can clearly see how the grout has tinted the stone and changed its look.

How do I apply (and how often should I re-apply) sealer?

All of our sealers are easy to apply.


Pour a small amount of sealer out into a bowl. Using a sponge or clean cloth, rub the sealer evenly onto the surface of the stone and/or grout (you don't need to seal any surface you won't see when the project is finished, like the sides or back of your tiles). Buff off excess (when to start buffing varies from sealer to sealer, usually after 3-5 minutes), and allow to fully dry.


Many people think they'll have to reseal their stone every 6 months or every year, which is only the case if you purchase a topical sealer that sits on the surface and wears off quickly. However, a high-quality penetrating sealer can last for 10+ years! A penetrating sealer will sink into the stone to provide a deep, long-lasting seal, while a topical sealer will sit on the surface and wear off more quickly.

Our Sealers

A quart of Miracle Brand Water Based Sealer

Miracle 511 H2O Plus Sealer

  • A water-based penetrating sealer
  • Great for natural stone, ceramics, and grout
  • Won't alter the appearance of your materials
  • Odorless, Low VOCs
A quart of Miracle Brand Enhancing Sealer

Miracle 511 Seal & Enhance

  • A solvent-based penetrating sealer
  • An enhancing sealer: makes colors of natural stone and grout appear deeper, darker, and bolder
  • Great for unpolished natural stone and for darkening the color of cement-based grout
  • Does not change the finish of natural stone: polished stone stays polished, matte finishes stay matte
A quart of Miracle Brand High Gloss Sealer

Miracle High-Gloss Finish Sealer

  • A water-based topical sealer
  • Adds a high-sheen finish to unpolished natural stone, ceramics, and grout
  • Not for use on already-sealed surfaces
  • Low VOCs

Other Products to Consider

A quart of Miracle Brand Finish and Sealer Stripper

Miracle Finish Sealer Stripper

  • Strips old sealers, wax, grout haze, coatings, synthetic finishes, grease build up, and deep-set stains
  • Won't damage natural stone or grout
  • No strong odor
32 oz Spray Bottle of Miracle Brand Clean and Reseal

Miracle 511 Kleen & Reseal

  • A daily cleaner for tile, stone, and grout on floors, walls, or countertops
  • Will not harm or strip sealers
  • Adds a little bit of sealer with each cleaning, increasing the lifespan of the sealer

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