YES! It’s as simple as that. Granite is a stone. Although it is much denser than most stones, it is still porous, meaning it can still stain. Sealing any natural stone, including granite, helps prevent these stains.
Now there are several types of sealers so if you are going to seal them yourself, you may want to understand these types. To make things simple, we will break them down into 3 separate categories: topical/acrylic, penetrating and impregnating.
Topical/Acrylic – I lumped these 2 together because honestly, neither are anything I would ever recommend to seal granite or any counter at all for that matter. A topical sealer does what it sounds like it does, sits on top. This means as soon as you start to wear the sealer (which you won’t know when this happens), any liquid is going to penetrate into the stone and can be quite expensive to get out. On the flip side, you have acrylic sealers. Acrylic sealers are topical sealers but are even more of a nuisance because they have to be applied often and each time add a layer on top of your stone. A friend of mine, aka @drimarbleandstone, had one customer who had been using an acrylic sealer on their counters for years and they had started becoming gritty. The grittiness was the result of dirt and dust that had embedded itself in the acrylic (which will happen no matter how often you clean). When my friend started removing the sealer, he pulled off a piece that was a quarter inch thick. Needless to say this was not a cheap repair for the customer!
Penetrating – Again, pretty self-explanatory. A penetrating sealer penetrates into the stone, filling the pores and helps prevent staining. My only problem with penetrating sealers is that most do not penetrate the stone deep enough and can also start to yellow over time.
Impregnating – Obviously I saved my pick for last. Impregnating sealers are essentially penetrating sealers but better. Most are formulated to go deep into the stone, allowing for a longer lasting seal and better protection. There are several good impregnating sealers out there; however, there is one company that seems to have outdone themselves. Stone Pro’s Impregnating sealers – Porous Pro, Ultimate Pro and Pro Sealer are all technically solvent based sealers; but here’s the kicker, they are really hybrids (water and solvent based)! What I mean is that their formula has a 3 step process – the fluoropolymer (fancy word for the ingredient that penetrates the stone) penetrates deep into the stone, then the solvent pushes that ingredient further into the stone, leaving a water based ingredient on top of your stone. This creates 3 layers of protection!!! Now don’t get me wrong, Miracle Sealants and DuPont both make pretty good products but they have their limitations and conditions and truly need a professional to use. Stone Pro’s sealer can be used and used properly by anyone.
What it comes down to – pick the sealer that best suits your needs, wants and most importantly, your stone. Granite is a dense stone but can still stain, scratch and crack. Protect it! No matter what your contractor/installer/designer says, granite needs to be sealed!