If this is the case you could try using alcohol.
Acetone granite sealer.
Pour on or spray on the sealer and spread around a small section to form a thin glossy film.
However there are some situations when the careful application of acetone can help you remove stubborn stains.
Prior to the application mask off any surfaces not intended for treatment.
Acetone will strip sealer.
It should not hurt the granite however depending on the type of sealer on the granite acetone may not be effective.
The sealer penetrates granite pores and can be effective for up to 3 5 year on interior surfaces.
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If the mc doesn t work then likely you have a a rare granite that etches but most likely it is a sealer residue or doctoring dye issue.
It s what we use when asked to reseal an existing countertop when the sealer used is unknown.
If you do clean your stone with acetone it s important to immediately reseal it after.
In certain situations acetone can be used on granite.
Clean the surface with acetone or denatured alcohol.
Acetone is a chemical that is too harsh for some surfaces.
The basic steps for sealing black granite are.
Granite is capable of handling acetone s strength so acetone can be used to clean granite floors and countertops.
Allow sealer to absorb for 2 5 minutes.
Granite scratch removal and sealing are very specialized services and we highly recommend you contact a pro in your area if you feel like you re in over your head.
Try acetone or methylene chloride found in paint strippers.
For a granite countertop apply an even coat by a paint pad brush or roller and allow the sealer to penetrate the surface for 15 to 30 minutes.
It s always best to use a stone safe granite cleaner.
Acetone based concrete sealers are escentially solvent based concrete sealers.
Treat with acetone if you notice that the granite countertop near your stove or sink has begun to dull it may be grease oil soap scum or other thicker residue that is marring the surface.
In my experience acetone has never damaged a stone or quartz countertop and it will remove almost anything on the surface.