Even though concrete is solid, it can absorb liquids exactly like a sponge because it is an extremely porous material. From water to greases, vehicle oil, and grime, various liquids can seep into the concrete's pores. Once absorbed, these liquids are extremely hard to remove from the surface. By sealing your concrete, you will cover these pores and thus, liquids won't be able to seep into them. Ultimately, this will help prolong the life of your concrete by a few years.
13 July 2015