Sealers for stone, such as, granite penetrate beneath the surface of the stone by natural absorption and some types of stone absorb more than others. Granite sealers incorporate a solid such as resin along with a solvent. The solvent permits the resin permeate the stone and then evaporates while the resin blocks the pores of the stone and prevents liquids from entering. One of the most crucial measures in the sealing process is to clean up the surface so that alterations to the finish of the surface are prevented.

Granite sealers may prevent stains but it ought not be used on granite countertops unless you are told particularly that you should seal the surface as with the case of black granite. Also, a number of grades of commercially used granite have such a high density that they'll not absorb the sealer. Different grades of granite have different requirements depending on how porous they are. You can test the surface by putting a few drops of lemon juice on it. If the drops are absorbed in about 1 min, the surface may be protected with a sealer. If the juice is not absorbed at all, the surface does not require sealing.

There are many quality solutions in the market that use silicone or siloxane bases and need to be renewed twice yearly and a lot of folks have misguided beliefs because of them. Several granite industry experts advocate the usage of fluorocarbon aliphatic resin sealers. Unlike silicone, these sealers will not evaporate or deteriorate with the passage of time. One such product, MB Stone MB-4 impregnator, comes with a 10 year warranty. Sadly, it is on the costly side nevertheless, you get all that you would need that in this case is easy maintenance in addition to peace of mind. Nevertheless, if you are dealing with calcium-based stone such as limestone, there is nothing that can be done to stop the destruction brought on by acid.

Sealing granite only demands a few minutes because the process is as simple as spraying on the sealer, letting it sit for a few moments and then cleaning off the excess. Denatured alcohol does wonders for degreasing the countertop however proper cleaning, which can be vital prior to sealing, should only be done with specialized cleaners and not with ammonia or Windex. Among the best specialized cleaners is MB Stone Care MB-5 Marble, Granite and More Spray Cleaner, which often forms part of a ready-made stone care kit.