Typically, granite should be resealed every 12 to 18 months. Nevertheless, there are some other factors that come into play when determining how often to reseal granite countertops. For example, a lighter colored granite will need to be resealed more often because it is typically more porous.
You don't want to apply sealant too often. If you do, sealant will pool on the surface instead of absorbing into the stone.
A simple water test will help you determine if sealer is needed. Pour about a quarter cup of water on a few areas of the counter. See how long it takes for the water to absorb. If the water absorbs into the stone in less than five minutes, the stone does need to be sealed.
Duration. A good granite sealer can last anywhere from six months to five years. However, even if your countertop is sealed, be sure to clean it regularly.
Water Will Discolor Them
Even something as simple as leaving a cold glass with condensation on your unsealed counters can change them. That's because water can penetrate the stone and leave behind water marks, permanently altering the appearance of your counters and potentially making them look dirty.
It's important to understand that an impregnating sealer should not alter the color or finish of the granite counter. It won't make a polished surface dull, or a matte counter shiny. It's invisible when dry.
One question that comes up a lot when working with granite countertops is “Does granite need to be sealed?” The answer is very simply “Yes.” Certain stones, like granite and many other natural stones, are porous. This means that a sealant needs to be applied to prevent staining from water, oils, and other liquids.
Resealing granite prevents permanent damage to the stone and restores the original, factory shine. There are many sealers to choose from, but your granite countertops retailer should recommend the best product for your exact variety of stone.
If you want to follow up sealing with polishing to bring out your granite's natural luster and color, make sure you wait at least 24 hours after sealing. Granite polish should only be applied once the seal has cured and the surface is dry and clean.
Choosing the Right Sealant is Essential
For this reason, look for products in the class known as impregnating stone sealers. They are chosen by professional contractors for sealing granite, marble, and slate countertops. The top-rated product in this class is Tenax Hydrex Impregnating Stone Sealer.
Apply sealant to countertops
Use a spray bottle, cloth, or brush to apply it. The entire surface should be damp, but not soaked. Give the sealant time to absorb into the stone. On average, it should take about 20 minutes, but take care to read the directions on the bottle of sealant for specifics.
Granite is Heat Resistant
Placing a hot pan on a well-maintained granite slab will not cause it to crack or weaken. Just remember that repeatedly placing a very hot pan on the same spot may cause granite to discolor.
A few '15-year' sealants are some of the best chemically engineered sealers available. They penetrate deeply into the stone and provide superior water & oil repellency. However, like all sealers, '15- year' sealers cannot prevent etching and unfortunately, they do not prevent stains for 15 years either.
Improper cleaning, neglected spills, and other effects of everyday use can easily mar its surface. A quality penetrating or impregnating sealer will soak into the granite, filling the porous gaps, and keep damage at bay.
30 minutes after the final application, wipe off the excess sealer with a microfiber cloth. If excess dries on the surface and hazing appears, spray additional sealer onto that area and wipe up immediately. Keep surface dry for 24 hours after the application process is complete.
If it beads up, you have a secure seal. If after a few minutes the water has soaked into the granite, then it's time to reseal the stone. DON'T: Use harsh or abrasive cleaners and sponges. Windex; acidic cleaners, like vinegar, lemon, lime; or anything with ammonia or bleach should be avoided.
After sealing a granite countertop, you will need to wait a period of time to allow it to take effect. The most common length of time here is 48 hours, but this may vary between products – once again, read the instructions!
Is a Rough Granite Countertop Surface Normal? If grit is present on your granite countertop, it is likely due to poor quality granite – an issue which cannot be solved readily without countertop replacement. In some instances, grout particles may flake off from newly grouted backsplash, although this is less common.
Granite polishing powder: Also called stone polishing compound, powder offers a quick and easy way to put a fresh gleam on granite while removing minor scratches and stains. If using it dry, choose a buff polishing pad to work the polish over the surface of the granite in a steady, circular pattern.
Since granite countertops have a sealant on them to keep them shiny and stain-resistant, you want to avoid using anything too acidic or basic on the granite. Frequent use of vinegar, Windex or bleach will dull the granite and weaken the sealant.
If your countertops are damaged, badly dulled, if they've never been thoroughly cleaned or if they have etching, a professional can completely refinish and reseal the granite.
Sealing is a simple process. First, thoroughly clean the countertop surface with water and ph-neutral dish detergent, rinse with clean water and dry. As a final step it's a good idea to use a cloth saturated with denatured alcohol (available in the paint department) to do a final wipe down.
Whether or not old sealer was removed, the granite still needs to be cleaned prior to sealing. Spray a daily granite cleaner on the surface and wipe off with microfiber pads. The pads must come up clean (no dirt or residue) before proceeding to the next step.
Fancy cleaners aren't necessary for cleaning granite counters on a daily basis. You really only need three things: Warm water, mild dishwashing liquid and a microfiber cloth. Tip: Make sure your dishwashing liquid doesn't contain citrus extracts, as they're too acidic for granite countertops.
Natural granite stone will not fade or yellow in the sun. Granite slabs treated with dyes or resins can fade or darken over time. Avoid this problem by working with a reputable supplier and sealing your countertops regularly.