Ames Research Laboratories AMES BMX1WRG 1 Gallon Blue Max, White Waterproofer, Regular Use in Interior & Below-Grade Exterior-Concrete Sealer, House Paint and More. Liquid Rubber

Works but needs a top coat if used outdoors in the sun. Didnt know that when i bought it.

It is slimy. I used it to waterproof a concrete bird bath. I used two coats. I recommend letting it cure at least a week in warm weather before filling it with water. If you wait longer than what you think it should take to cure, it works great! I have a birdbath heater/fountain and the birdbath is completely sealed and waterproof.

Guest room had frustrating wall seepage. Not anymore. Use this product and avoid further damage.

Going to give this 4-stars. I'm using it to seal a cave I put in my shower to accommodate a soap insert in the wall. For my purposes it works. This product feels like liquid rubber in the can, but when you apply it, it thins and some of your brush/roller will wipe some of it away. You can probably get a true membrane with a sprayer, but I do not see this thick pasty stuff spraying well. As for brushing and rolling, it will work, but you will need about three coats, with the stroke of each coat 90-degrees to the prior coat, in order to get a truly sealed membrane. I would also not recommend using this as a final coat on an outside wall, as I can see peeling as a potential problem. When it comes to leaky walls, including basement walls, I have always done the following (it's expensive and a lot of work, but the only way to assure the leak stays on the outside): 1. Seal cracks on the outside wall with water plug cement and coat with tar when dry. 2. Seal the cracks on the inside wall with water plug cement. 3. Apply a coat of thinset and screw in cement board over the wall. 4. Fill cracks between cement board sheets with thinset. 5. Apply a coat of thinset to the cement board and finish with ceramic tile. 6. Grout tile. If I were to do it again, then I can see this product being used as extra protection by sealing the wall before step 3 and sealing the cement board before step 5.

This is great stuff. I have repainted my stock tank pool with it works great. One thing to note is that this is not like regular paint more of a consistency of runny snott. But does a great job water proofing over a primer also the white takes usniversal pigment really well. I added blue to it so i would have a light blue inside to my stock take pool.