If the granite doesn’t darken within 30 minutes, this means it has a strong seal that is offering excellent protection. Frequent sealing protects the surface of the stone for long-lasting resistance to etching, stains, and soil buildup. Apply a drop of water at least ½-inch in diameter to the top of the stone and let stand for at least 15 minutes. If you only have to seal your granite countertops once in a while and you love the look of granite, go for it!

Sealing granite isnÂ’t rocket science: simply wipe the granite sealer on, let it set about 30 minutes, then wipe it off. Let the lemon juice and the oil sit on the surface of the stone for 5 minutes or so, and then wipe it dry. If it takes 30 seconds or a little more to turn dark, then you may have a stone that can be controlled with a good quality impregnating sealer.

If the stone takes 4 to 5 minutes to darken, a good impregnator sealer should be applied and re-applied every 3 to 5 years. If the stone darkens in 30 minutes or not at all, consider yourself lucky and sealing may not be necessary due to the hardness of the stone. Yes, you can easily seal your own granite countertops with professional quality … probably better than your granite contractor or builder provided. If dark spots appear quickly, the stone is potentially a problem since it is reacting with an acid. Quality granite sealers or impregnators are below-surface penetrating sealers, not topical sealers. Denatured alcohol, it turns out, does wonders for cleaning granite and cutting through film buildup on your counters. As mentioned earlier, dark stone is often more dense and won’t need sealing, but lighter color granites are often more porous and will definitely need to be sealed. This damage will appear in the form of “ghost water stains” or “water rings” confused for granite water stains. If you’re dealing with calcium based stones like limestone or marble, no matter what sealer you use, you cannot avoid the damage caused by acids. Applied properly, this sealer will last 10 to 15 years and you don’t need to reapply before then!

You can tell if the water has been absorbed into the stone because the granite will darken. If your granite darkens before the 30 minutes are up, it needs to be sealed as soon as possible.

Ultimately, you canÂ’t over-seal granite or other types of natural stone, so even if your counters passed the water test, thereÂ’s no harm in sealing them again. Once youÂ’ve sealed your granite counters, make sure you regularly clean them with a specially formulated granite countertop cleaner and maintain the shine with a safe-on-stone polish. If the stone did not darken then your stone is probably sealed against water-based stains.

I didnÂ’t realize that certain granite needed to be sealed to prevent water damage, as opposed to a quartz countertop.

Generally speaking, the more absorbent a stone countertop is, the more it needs to be sealed. If the stone surface turns dark almost immediately, you do not want this granite for your kitchen countertop.

If it takes more than 5 minutes, then you have a stone that probably doesnÂ’t even need to be sealed!

If the stone darkens in 10 to 15 minutes, apply one coat of sealer then check it again every 3 years or so for absorbency.

This article will help you understand granite sealing and determine how well your tops are protected. Understand that stone characterized as granite has much different needs than marble or limestone (which are calcite-based stones, react to acids, and are typically more porous and subject to “etching”). If the drops take a minute or so to be absorbed, granite sealer can be used to protect the tops.

As a granite fabricator and installer, we always degrease countertops and give them their final cleaning with denatured alcohol. If you apply sealer to a stone that doesnÂ’t need it and wonÂ’t absorb it, some sealer will remain on the surface of the stone.

If you apply it anyway, thereÂ’s the distinct chance that some of it will remain on the surface of the stone and it will be affected by spills, giving the impression that the stone is damaged. You can test your stone to see if it needs sealer by putting a few drops of lemon juice in an inconspicuous place.

As a fabricator and installer, we always degreased countertops and gave them their final cleaning with denatured alcohol.



Source: thegraniteguy.us/granite-countertop-blog/water-test-seal-granite-countertops/
genaGraniteStone
If the granite doesn’t darken within 30 minutes, this means it has a strong seal that is offering excellent protection. Frequent sealing protects the surface of the stone for long-lasting resistance to etching, stains, and soil buildup. Apply a drop of water at least ½-inch in...