Although natural stone such as granite slabs are inherently tough, their porous construction makes them easy to be prey from inside for stains, moisture and damage. This can lead to a ruined countertop granite finish, discolouration and even early damage. That is why sealing is necessary for any kitchen made of granite. There are various types of stone sealants on the market, and we are looking at penetrating sealers here. MORE Surface Care-Marble Sealer is one of the authority sites on this topic.
Penetrating sealers, or so-called impregnators, are sealants that flow through the natural stone pores and act as a barrier against stains, moisture, and liquid infiltration. Compared to other sealers, PS goes below the surface of the stone and provides it with external and internal protection. Such sealers are water-resistant, and it prevents corrosion and structural damage from inside the stone by preventing moisture from being absorbed by the stone.
Another benefit of using penetrating sealers is that they allow breathing of the stones. What this means is that not only does the sealant keep liquids and stains out, it also allows for the evaporation of accumulated moisture from inside the stone. This is the distinct advantage of piercing sealers over other types of sealers. Through letting the stones breathe, it can dry off in time because air would move through PS if ever there was moisture that got through the initial seal.
Of addition, there are drawbacks to penetrating sealers too. Another is that salts and efflorescence are not completely resistant to these. One is that penetrating sealers will also need re-application because these would fairly easily strip off the stone. The cost of sealing over time is something you need to consider particularly when sealing a wide area of the floor.