I could use some help here. I have already sealed my master bath granite top about six times, used three different types of sealers. I'm still getting dark water spots! What am I doing wrong? Any help or advise would be greatly appreciated.
Note; the granite top was bought new, left inside an unheated garage for about eight months before it was installed. The paper work that came with it said it was factory sealed (no freaking way) and was bought at the local Home Depot, the brand is Pegasus. The last two coats of sealant was a brand from the local tile shop, Superior adhesives and chemicals. (says it lasts up to 15 years)
What you are doing wrong is you possess erroneous expectations. Mixing sealers also isn't a wise move.
Sealers are made to breathe. So it only stands to reason that they will also allow moisture migration. Sealers are to slow penetration and allow you an opportunity to clean up a spill. Sealers are in no way a "coat of armor". Rings of moisture can be expected.