Sealing marble vanity top

Pro seal is what i used and it works great. It is not marketed like other stuff you see on the internet, but when I asked several pro's what they used they all recommended it to me. I would also recommend a solvent based sealer rather than a water based. They last longer and are better at stain defense. But they do have their downside, such as harmful chemicals when applying. So you would need a face respirator, which you can get from home depot or lowes. Also i opened a window and used a box fan to suck out the fumes and made sure my wife a kid were not home.