Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 5 Gal

I live in a 100 year old house and had experienced flooding in a ground level room. Apparently this had been going on for some time but previous owners didn't mention it. After getting quotes of up to $12k to excavate and repair the foundation (below grade) I decided to give it a try. After researching the internet I found this sealant and purchased the 5 gallon size. Next step was to excavate 25 ft long, about 18 inches deep, around where I thought the leak was occurring. I found several cracks and deteriorated concrete that I patched. Last step was to apply 4 coats of the foundation sealant using a concrete brush. Instructions say you can roll it on but it just seemed too thick so I went with the brush. My coats were probably thinner than what the instructions recommended but it looked really thick when I was applying it. Each coat dried in about 24 hours. You can tell when it's cured by the color change and it being dry to the touch. After the 4 coats, I back-filled the trench and waited for the rain. It's been 4 months and we've had several heavy rains with no leaks. So I'm calling it a success at this time. I ended up spending about $250 in materials so I'm glad I didn't contract this out. Maybe 30 man-hours to trench, patch, coat, and back-fill. I'm in my 60's so others may be quicker. Some noteworthy comments: I only used a couple of gallons when I had estimated I needed almost 4. Maybe my coats were thinner than they should be but appears to have been effective regardless; I used concrete brushes at about $10 a brush. I tried to clean the first one but this stuff is like a thick tar and wasn't worth the effort. I hate to put unnecessary stuff in the landfill but cleaning was just too difficult. I've got another area I may address similarly so I'm hoping the sealant will last a while after opening. Will probably be Fall project. Overall, a very good product, easy to apply and work with, and appears to have addressed my leak issues.

A superior product. Goes on easily and drys fast. It cures into a rubber-tar based coat. I advise 2 coats. On corners, use the gause for added strength. This product was like painting Bitumen on the walls. Underground, this will last a hundred years and there's no way water will pass through a properly prepped wall! Color is black and fills voids, although a parge and repair should be used first then some gauze if theres a structural repare thats called for. When I purchased this, it was quite expensive. The price has come down since my purchase thus making it a better deal. Btw, thise using Blackjack, blackjack isn't in the same league! Wish I took some pics or did a video, just take my word on it as this was far from my first rodeo.

Worked great. Thick and applied easily.

Really nice sealant just wish it did not have such a high shine. If you prep the surface well, it goes on easily and seems to have very high adhesion. Worked quite well and now I will just need to wait and see how it holds up.

this is perfect, i used to seal my shop floors to the concrete. I use a tape to help make the seal better. i covered a 30x50 feet shop.

We used it to seal our garage doors and lower walls. It worked very well and it has kept the rain out.

Stopped the leaks in my garage

This product is amazing, a must have for sealing concrete foundations. I highly recommend.

Great product Make sure to follow manufacture instructions to use.

Works well and shipped relatively fast.

Product is a good consistency and didnt require any mixing, applies easily, did 4 coats and have lots left over.

Great stuff i put this down on my bk yard as the dogs were getn burns off layn on the concrete for so long on there legs, this has worked a treat nice coat over the concrete now an looks great 👍🏽 would definitely buy this again!!!

Love this, goes on extremely thick on the first coat which makes it nice.. We used a paint brush to get into all the cracks and crannies on our brick wall.. will definitely be ordering again