Some Penetrating Sealer Basics

Though natural stone such as granite slabs are inherently tough, their porous construction makes them easy prey for stains, moisture, and damage from the inside.

This can lead to a ruined granite countertop finish, discoloration, and even early damage. That's why sealing is essential for any granite kitchen. There are several types of stone sealants in the market, and here we look at penetrating sealer.

Penetrating sealers, or also called impregnators, are sealants that go within the pores of the natural stone and act as a shield against stains, moisture, and liquid seepage.

Compared with other sealers, PS goes below the stone's surface and provides it protection from the outside and inside. These sealers are water-resistant, and by rejecting moisture from being absorbed by the stone, it prevents corrosion and structural compromise from within the stone.

Another advantage to using penetrating sealers is that it allows the stones to breathe. What this means is that the sealant not only keeps liquids and stains out, it also allows for trapped moisture from within the stone to evaporate.

This is the distinct advantage of penetrating sealers over other sealer types. By letting the stones breathe, if ever there was moisture that got through the initial seal, it can dry off in time since air can pass through PS.

Of course, penetrating sealers also have disadvantages. One is that they are not entirely immune to salts and efflorescence.

Another is that penetrating sealers would also require reapplication since these can wear off the stone in a relatively fast manner. The cost of sealing over time is something that you need to consider especially if you're sealing a large surface area.