Below is an description of how sealers work on counters and flooring in natural stone. There may be more bad information about maintaining a building material nowhere than there are about sealers in stone. If you’re standing in a stone dealer showroom you’ll hear sales men claim “yeah every natural stone needs to be sealed” to any client, the problem is, it really does. Checkout Marble sealer in Hayward.
I ‘d like to briefly mention just what a sealer is, to back up a few steps. Stone sealers are trapped in either water or a solution at a specific stage through polymers (resins). The unseen polymers cover gaps in the face of the stone and improve the likelihood to avoid a leak that might potentially damage the stone forever. These sealers are then applied to the surface of the stone where they eventually penetrate the porous stone, filling microscopic (and some not so microscopic) holes. The desired result is a stone surface which has increased surface tension and decreased absorbency when applied correctly. The sealer instead gives the stone the repellence of water and wax. No sealer guards the stone from becoming dirty. Nor does it prevent the low etching of ph which is normal in calcite soil.
The variables involved in sealer applications:
The sealer’s suitable for the job. Let’s say you have an acrylic floor sealer applied to a stone floor. The stone doesn’t even look like what you first picked out and you’ll have to talk to a guy like me to grind it off. Under all circumstances, a proper stone sealer will become invisible on the stone surface
The stone’s suitability for sealer. Most stones do not accept a sealer because of the finish (honed or polished), so it will rest right on top of the stone sheet. No sealer can be removed from an pure black granite with a smooth edge, nor would a painted cream marfil. It’s going to sit up there, and look like crap.
Stone condition immediately before sealer application. Sealers are often employed to cover scratches and grout haze from an instillation. Everything I would tell, is happening. Llame me.
Few sealers simply perform better than others. A solvent sealer works better than a water-based sealer. There are also enhancer sealers which may contribute to some stones’ color depth. They can change the way a stone looks, but you will not see the sealer or residue on the surface of the stone when applied properly.
Sometimes you really need a sealer (honed finish in a kitchen with lots of kids and a dog) because of the intended use of the stone and sometimes (a polished finish marble with two retired people removing their shoes at the door) you do not.
So the variables are the applicator, the sealer, the stone and the transportation. Go carefully through those with your stone pro to make sure you get what you need.
No sealer can prevent the floor from being dusty, too, mind. Look at the Instructions for Maintenance mentioned in the above article. Sealer helps to allow you a little longer before it penetrates into stone to clean up an oil or water-based leak.