Miracle Sealants 511 Impregnator Penetrating Sealer - 1 Gallon (4 Pack) | Waterproof Stone & Tile Sealer for Natural Stone, Concrete, Grout | Perfect for Countertops, Showers, Floors & Outdoor Pavers

My project: Clean and seal a basement floor after the cats had decided the didn't want to use their litter pan.How much did I need? Approx two quarts for two coats over approx 700 square feet. In other words, 700 sq. ft. per quart.Does it work? Yes, so far. Water beads up beautifully on both the tile and grout that have been treated. It's only been a month so far.How easy was it? Application was easy, but not the cleaning. This is a penetrating sealer, so any stain you leave on the tile or grout will be permanently sealed in. I cleaned the floor by:1. Spot-cleaning the worst spots (cat pee, yuck)2. Scrubbing the entire floor by hand with a stiff brush3. Used a copper wire brush to scrub off the top layer of the dirtiest grout4. Wiped off excess soap5. Mopped twice to ensure no soap residue that might interfere with adherence of the sealantOverkill? Maybe, but I wanted to do this right the first time.For 700 sq. ft., It probably took me 20-ish hours to clean, and only 5-10 to apply two coats. Cleaning was the vast majority of the work.The application process: Easy, but a bit tediousI have 12x12 tiles with approx. 1/4 inch grout. That's about 1,500 linear feet of grout (my best guess). Used a small children's paintbrush and carefully painted over all the grout. After each application, waited 5-8 minutes before wiping off. My tiles are completely matte limestone, and so easily soaked in any excess sealant left on the surface. I just had to buff the excess into the face of the tile, and it would soak in nicely. If I had glass or other glossy tiles, I might have had to wipe off 100% of the excess, which would be much more difficult.The Result: Dry to the touch in hours, started walking on it in a few days.Water beads up fantastically and wiping up is easy. The tiles have a *slightly* but barely noticeable increase in the glossy finish after having dried for a few days. The cats haven't peed on it yet, so I don't know how well it will truly work.Recommendations:1. Ignore the square footage guidelines. What matters is how much *grout* you have, not how much *floor* you have. 2-inch tiles with 1/4 inch grout will need a massive amount of sealant. I had 12-inch tiles so didn't need as much. Make your best estimate and then test before buying what you think might be the right amount.2. Test a small section first to see how much you need. My tiles and grout were very "thirsty" and soaked it all up easily. I put two coats everywhere, and a third coat on the most heavily trafficked section. Test your tiles first.3. Use disposable equipment. Latex exam gloves, a plastic cup, cut-up T-shirts and a child's paintbrush were all the supplies I needed. This stuff needs mineral spirits to clean up, which is a major hassle. Disposable = no cleanup.4. Knee pads! You will be kneeling on a stone floor for hours.Good luck.