STONETECH Heavy Duty Grout Sealer, 1 Gallon (3.8L) Bottle

Used this in the past when it was DuPont. Do two coats, clean with Hydrogen peroxide and a little comet cleanser where really dirty. Rinse and recoat if necessary. Mine last ten years before recoating.

Did a lot of research about products & process. Settled on this due to the excellent reviews. Couldn’t find it in stores so ordered from Amazon. It works as described. Used it to seal tile backsplashes in kitchen, bathroom showers & tile floors in 80% of our new home. It doesn’t change the color or finish of the tile or grout. Really happy with it.

We found this product because my husband used to work in the construction industry and this is what the pros recommend. We built a new home last year in a new neighborhood and, of course, had to seal all of the new grout in the bathrooms and kitchen. Almost none of our fellow new neighbors knew to do this. We have white and off-white grout throughout the entire house, as do our neighbors. But it's been a year now since we moved in and sealed and we are the only ones who still have grout that looks EXACTLY like it did the day we moved in. And we have had kids trample mud and gunk all over it, spilled dark pigminted liquid and powder makeup all over it, and spilled coffee etc on it. This stuff is the ONLY sealer you want to use! And it's easy to apply! My only advice is the same as another REVIEWER..DON'T use a roller or foam brush. Get a GOOD quality artist chisel brush and use a plastic cup. Went through a foam brush and a foam grout roller before finally breaking down and spending $7 on a chisel brush. After that it went SO fast and was super easy. Just wait 15 min between coats and do 2 coats and you are done! And it really doesn't smell much at all.

Purchased 2 gallons and the sealing properties are just not apparent. Always used "DuPont" sealer in the past and it was always 100%, now not available anymore

I used this product to seal the grout on my new tile floor. This sealer does not alter the color of the grout, and works very well (it's one of the best grout sealers on the market)... but I learned a couple of things during the project... Here's some tips: -Make sure to apply the sealer with a quality paint brush that holds and spreads the product well. Don't bother with those roller applicators, paint pads, or artist brushes. -Apply the sealer LIBERALLY moving the brush slowly and let it soak in to the grout for at least 10-15 minutes. Don't worry about getting excess sealer on the tiles. Wipe up the excess sealer with a towel. It does not stain or leave a residue on your tile. -Go back and apply at least 2 OR 3 COATS. When the sealer stops seeping in to the grout, you know you're done. I would have given the product five stars if it would have worked in 1 or 2 coats, but it took me 3 coats to finally get the job done. ....but that is very typical for an "impregnator" type sealer like this. The bottom line is it worked well. Very good product.

Used this on roughly 500 sq.ft of tile floor out of 800 sq.ft...the reason I didn't use it on all is that I wanted to use some from a previous job. Have to say that I am IMPRESSED! I had sealed a small area in a bathroom, about 60 sq.ft, got busy and let it set for almost 4 hours...after I went back to apply a second coat, to late, the sealer had already set in and would not soak up. I went back over the area that I had used another product, and wow...couldn't believe how many spots were soaking the third application, 2 of the other plus one with the Stonetech. I am SOLD!!

This stuff is still holding strong a year after sealing our granite countertops, backsplash grout, and tile grout. Though sealing an entire house was extremely tedious, this stuff got the granite good to go in 2 coats and the grout good to go in only 1, other than the wetter areas where we applied additional coats. The only place it hasn’t held up (there is some discoloration) is in our all-tile shower, likely due to the fact that it’s used multiple times a day and we have extremely hard water - I recommend applying 3+ coats in areas like this. Didn’t alter the color of anything at all, but some residue partners were visible in the sunlight on the granite where I was a little sloppy with application.

I'm a contractor and have decided to do this part of the job after I have my tile guy work his magic. He has been in business for many years and told me that this was the product he uses all the time and that he has been very pleased with it. I called around my area locally to get the price and found it extremely expensive. Then I found this product on Amazon by the gallon at a steal! I paid the same price for a gallon that my local tile store was selling a quart for! I highly recommend this product and hopefully this review will be linked to the particular seller on Amazon where I purchased it.

Before trying this product I tried the one made by Mapei (same fabricator as the grout used) and despite the Mapei sealer bottle said will not change the appearance of the grout it definitely darkened it at the two areas i tested and the grout stayed dark after 72 hrs. So i decided to try this product to seal my grout. Despite being a lot more expensive than the Mapei sealer it DID NOT change the colour of my grout. I wouldnt have made so much as a fuss if the tiles weren't Italian porcelain 64" x 32" tiles but for the price i paid the tiles no way i was gonna cheapen on the sealer! I highly recommend this product. Easy to apply. Excellent procuct!

I applied it to an exterior tiled balcony that receives heavy rain. It goes on easily with no smell. It has a good water resistance, so far (3weeks). It is water-like to apply, so coating is not thick. I cannot say how it will hold up under intense tropical sunlight. No complaints so far. I suspect I will have to re-apply periodically, but that’s true of all products.