The 9 Best Stone Sealers

For most granite, marble and quartzite counters, Miracle 511 Impregnator is the simple, low-cost answer, and stone shops have relied on it for decades. It soaks into the pores and leaves no film or shine, so the counter looks the same afterward. Miracle says a pint covers up to 500 square feet, enough for several kitchens, and calls it safe near food prep once it cures. The catch is a strong solvent smell, so open the windows.

Fabricators keep Tenax Hydrex on hand because it's cheap per job and leaves polished or honed stone looking just as it did. The Italian sealer pushes back both water and oil, and it suits granite, marble and quartzite indoors or out. Wipe it on with a cloth, then buff off every trace of the extra before it dries. The directions on the can are thin, and it doesn't say what the base is, so try a hidden corner first.

Seal it once and stop thinking about it: that's the promise of Dry-Treat Stain-Proof, a premium sealer for dense stone in kitchens, showers, patios and walls. It works deep in the pores and repels oil as well as water, and Dry-Treat says it holds up to pressure washing and strong cleaners. Older bottles say Stain-Proof Plus. The long performance warranty comes with conditions, so read the terms. A pint is pricey for what you get.

If solvent fumes are a deal-breaker, StoneTech BulletProof does the job with a water-based formula and only a mild smell. It's meant for indoor counters, floors, showers and grout, and the current label says it's made without added PFAS, the so-called forever chemicals. You let it soak for about 15 minutes, then wipe everything dry. Water beading can fade sooner than hoped, and a quart covers only about 100 square feet.

Built for jobs that mix stone, tile and grout, Aqua Mix Sealer's Choice Gold treats all three in one pass. The water-based formula works inside or out and protects within about four hours, so a bathroom is back in use the same day. Its maker now sells a version made without PFAS, but older stock may still be the earlier formula, so check the label. A quart doesn't stretch far, which makes big floors costly.

Thirsty stone needs a heavier sealer, and Miracle 511 Porous Plus is made for the travertine, limestone, slate, quarry tile and concrete that drink up ordinary formulas. It dries clear in under two hours and leaves the surface looking natural, so a rustic floor stays rustic. Indoors or out, one quart goes a long way. The label carries a danger warning, since it's flammable and the fumes are harmful, so ventilate well and keep sparks away.

Keeping a kitchen counter protected between deep treatments is the job of Granite Gold Sealer, a mild, water-based spray that's safe on food-prep surfaces. Spray a small section, wipe it in right away and buff it dry, and the maker suggests two or three rounds for the best result. This U.S.-made sealer is for granite, marble and other natural stone, not engineered quartz. Let it dry on the surface and it leaves a haze.

A low-cost way to top up a polished counter, TriNova Granite Sealer is a ready-to-spray blend that soaks in and leaves a little extra gloss behind. It has almost no smell, so it suits renters and small kitchens without much airflow. TriNova itself suggests repeating the treatment often, as much as monthly, which tells you each coat doesn't last long. If a drop of water darkens the stone after half an hour, it's time to spray again.

For patios, walkways and stone walls, Foundation Armor SX5000 WB goes on with a pump sprayer and bonds below the surface of flagstone, slate, bluestone, brick and pavers. It leaves no film to peel and no shine, and it has almost no odor. The maker claims up to 10 years between coats outdoors. It only works on bare, unsealed stone, and the pail holds five gallons, far more than a countertop needs.