When referring to stone, the word SEALER is wrong. Well, technically it is not, but the reason why I said it's wrong is because sealers for stone are totally different from any other sealer most people are familiar with.
To produce a finish (polished, matte, or satin), and to fill all of the little nicks, fissures and other surface imperfections.
A sealer for stone is none of that - None!
And that is why I said that the word sealer is wrong when referring to stone.
The right word is impregnator.
An impregnator is a below the surface (of the stone) sort of sealer. It's a product made of two major components:
The resin is dissolved by and within the carrier.
The only thing that an impregnator does is dramatically reduce the natural absorbency rate of the stone by filling in the spaces between the single minerals composing the stone. These spaces are known as pores - End of the list of performances.
This reduction in absorbency rate (or porosity) of the stone will make it possible that staining agents which get spilled on the stone will be kept at bay. They will stay on the surface of the stone for a period of time much longer than if the stone was not sealed.
The most important phase of the application of an impregnator is the total and thorough removal of the entire residue of the product from the surface of the stone.
At the end of the sealing job, the surface of the stone is as bare as it was before the sealing procedure was started.
Now the question is: how does an impregnator go inside the stone?
Quite simply, the stone absorbs it.