The best sealer for granite countertops is alphatic resin sealer that penetrates stone counters. Beware of granite contractors or salespeople telling you to seal your granite countertops every 6 months or every year. If that’s the case, you’re probably dealing with poor quality top coat sealers!
Properly sealed with impregnating sealer, your granite and other natural stone tops will be protected for 3 to 5 years. MB-24 Impregnator/Sealer from MB Stone Care will give you professional results with very little effort.
But if you want permanent sealing, 10 years of solid protection or more, the best granite sealer is MB-21 Enhance.
Why does granite need to be sealed?
Actually, your granite counters may not need sealer. Granites vary in how porous they are and how easily they can stain. For example, lighter color granites are often more porous and require multiple coats of sealer. Whereas, black granites usually need none.
How To Seal Granite
Apply granite sealer by spraying or wiping liberally over a small area, then let the product sit for approximately 10 minutes to allow maximum penetration. Make sure to keep the surface wet with sealer and don’t let it dry.
Remove excess sealer with a clean dry cloth and then buff the surface with another cloth until it shines. Allow 24 hours to cure before using the countertops or before applying another coat.
MB-24 Barrier Is The Best Granite Sealer For Your Home
MB24 is a formidable water based penetrating sealer for all porous natural stone, concrete, terrazzo, terra cotta, saltillo, slate, and grout. It provides excellent hydrophobic and oleophobic protection, stain resistance, and easier stain clean up.
Granite Sealing Instructions with MB24
Make sure countertop is dry and free from soils, waxes, sealers, and coatings. Liberally apply an even coat on the surface being treated using a lambs wool applicator, paint brush, low pressure sprayer, or spray bottle. Then let the sealer soak into the stone’s surface for up to 30 minutes.
The porosity of stone surfaces will vary. But, if the sealer absorbs into the surface in under 10 minutes, multiple applications will be needed. So repeat the process until the sealer stays on the surface for more than 15 minutes. But do not let excess sealer dry on the surface.
After the sealer has remained wet on the surface for approximately 20 minutes, remove all sealer and residue from the surface with a dry cloth or towel. Maximum stain protection is after sealer has fully cured. Curing takes 24 to 36 hours. When properly applied and cared for, MB24 will protect for 3 to 5 years. Coverage: 150 sq ft to 250 sq ft per quart.
Permanent Granite Countertop Sealer
A couple of years ago, we switched to a new penetrating sealer and color enhancer. MB21 from MB Stone Care is a professional grade, permanent stone sealer. It’s the best granite sealer if you want a permanent seal with no worries of reapplying.
This permanent granite sealer and color enhancer exceeds MB24 in performance, providing optimum protection from oil and water-based stains. This sealer is made for stone kitchen countertops and is safe to use in food prep areas and typically not harmed by acidic household cleaners. It’s easy to apply and typically, two coats are suggested. The result is a permanent seal for stone countertops. MB21 is also my “go to” permanent grout sealer.
Best Granite Sealer For Hotels, Restaurants, and Bars
MB-21 permanent sealer is also the best sealer for stone countertops in commercial areas. It’s made for stone countertops and it’s safe for areas that come in contact with food. Spray onto counters and let the sealer sit for several minutes.
Then wipe excess and buff with a cloth. MB21 is also a superior permanent grout sealer for hotels & restaurants. See How To Seal Grout In Hotels & Other Commercial Areas for instructions.
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