RadonSeal Efflorescence Remover for Brick, Concrete, Pavers & Masonry

This product does nothing either than living the stain all over the floor, and the instruction says apply to the wall and then after 15 minute rings it with the water for the next couple days the efflorescent back and more than that, the floor became staining that you won’t be able to remove, as you can see on the pictures, when I tried to contact Customer Service, they play themselves that they know nothing about the product that can leave stain on the floor and they hear that for they first time and what’s more interested, couple days after they decide to leave Amazon, so probably I wasn’t the only one who had problem with the product, cause they ran away with my money Amazon had good excuse not to pay me back even from the claim that I put with A to Z warranty (3 times) with the pictures nothing helps It’s a shame 😞

Efflorescence is tough to remove and I've tried multiple products and methods to clean up 180 feet of 5 ft tall concrete block retaining wall. This stuff works best and is relatively safe too. Go to a big box store and get one of these non metallic $4 spray bottles for application so you can be more precise and efficient with where you're putting it. Make sure to test in an inconspicuous area to start. Spray on enough to keep it wet and bubbling, wait 3 - 5 minutes, then repeat, wait again, and repeat. Keep the affected area wet with more product in the sprayer and be patient and let the chemical work. Then work it with a really stiff brush. Then wait some more and spray it again. Wait a few minutes and rinse. Then rinse some more. Use lots of water to rinse, this stuff is really aggressive and eats concrete so you must get it all off. Work small areas at a time until you figure out how this product works and then work your way up. Some of lighter areas only needed 2 or 3 sprays, with up to 6 on the thick stuff. It will come off. Be patient. Highly recommend and will purchase again if it comes back. PS, I did this without gloves with no problems on my hands and skin. I did wear safety glasses. You might want to put on some rubber gloves though.

Worked as per description. Our pavers were pretty stained and it took several applications, but things look better then they did!

I bought this product thinking it would have solved my problem but the stains remained and only got worse. I followed the instructions correctly and was very disappointed

According to the 4 star rating, cost and claims to remove stains we had high expectations that this was the product we needed. After several applications the stains were still there. Not as bad as before but nevertheless still there. Too high of a price tag to not work! Will not purchase again.