Why Is My Sealed Granite Blotchy?
by Mike Doyen
QUESTION:I used SCI cleaner to clean my black granite and 8 hours later used SCI Sealor to seal it. The black granite in the bathroon (which was done 24 hours ago) looks fine. The black granite in the kitchen (which was done 6 hours ago) has black blotchy spots all over it.Do I have a problem? If so, what should I do? ANSWER:Without knowing exactly how the granite sealer was applied I can't say why one seems fine and the other blotchy, but....Most black granite does not need a granite sealer. Black granites are typically so dense to be essentially non-absorbent and will not stain except in extreme circumstancses. In fact, most black granite cannot be sealed since the sealer will not absorb. What happens when a granite sealer is applied to a black granite like Absolute Black or Black Galaxy is that it just sits on top until it dries leaving a dull hazy and/or blotchy film on top. Now, if the sealer is wiped off completely prior to drying like it should be then you may not develop any problem. Not likely the sealer has absorbed at all, but wiping down until dry at least avoids creating a problem. If you did apply the granite sealer and just let it sit until dry it is possible that some absorbed and other areas it didn't. Anyway, you'll need to strip off the sealer using methylene chloride. You may have luck re-applying the granite sealer to try and get it to re-absorb the dried sealer then remove, but may be too late. You'll find complete information about granite sealers, how to properly seal stone and how to strip improperly applied sealer in the All About Sealing Granite & Marble ebook. And for future reference not all granite or stone must be sealed. Yeah I know you read that a lot, but it comes mainly from granite sealer manufacturers. All you need to do to determine if any stone needs sealing is to water test the surface in several places. Good Luck, Ryan P.S. Get all the facts, answers, explanations and simple solutions with step-by-step instructions for any issue, problem or question with our Granite & Marble Maintenance Manuals.
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