SIKA Sikaflex Crack Flex Sealant - Gray, High-Performance Polyurethane, Self-Leveling, Textured - Waterproof Seal for Horizontal Cracks - 10.1 fl. oz (Pack of 12)

The gray water tank on my class A RV was smelling terrible. It was getting inside the living area and making everything smell terrible. I couldn’t find a leak anywhere. When I looked at all the connections and the tank, the only thing I could find was how this pipe went into the top of the tank, there was no rubber connection with clamps. That seemed very suspicious to me. It just appeared to be stuck into the top of the tank, and sealed in there with what appeared to be plumbers putty. I called the manufacturer and asked if this was how it was supposed to be. I would purchase a rubber connection if it was available. They said they are still doing it this way and if they have a problem to use a Sikaflex gray compound. I purchased a tube, and although the pipe comes out of the top of the tank I used the self leveling compound. I started applying it above the suspect area and let it flow down over the existing stuff and let it flow onto the top of the tank. It actually made a very nice looking cone shaped seal. By that evening, I could tell the smell was getting better. It’s been about two weeks and you can’t detect it in the RV anymore. I have aired out the basement in the RV and that seems fine now too. I would highly recommend this flexible sealant. It’s amazing how flexible it is and how well it sealed this connection. We suffered with the smell for years until I had checked every fitting and the tank. The only thing left was this connection, but it appeared fine. The crack filling abilities of this self leveling system must have flowed into the source of the problem! Best ten bucks I’ve spent in a long time!

This stuff is amazing and absolutely delivers on it's promises! I originally completed this project using the horrible Dap version of concrete filler/seal which was horrible to work with and NEVER set (even after 2 dry 70 degree days) and essentially washed away on 1st rain. I completed the project again with this Sikaflex and it worked perfectly. It completely self levels and fills in the void. The best advice I have is DON'T touch it. Just lay your bead and let it work it's magic. It completely levels and leaves a smooth finish. Then come back and re-fill any voids that may appear. I had used sand then backer rod so I only had one corner spot that needed a little extra fill. I also sprinkle a little of the sand on the still wet seal to add to the concrete look though this Sikaflex already has a nice texture. This stuff has a great look on it's own and I'm so impressed with how well it works and looks. It's now cured and firm, yet pliable to the touch. I should have used this stuff in the first place.

I used the product for two different solutions: I filled a gap under my garage door seal, and to fill cracks on a porch slab. For the garage door seal I applied a few thin layers, where the self-leveling property works very well. I built up a good, flat surface. For the crack-filling, the product flowed into the cracks very well and seems to have sealed very well. Because I applied the product in relatively cool conditions, I contacted the manufacturer about that issue, and was given specific advice. The ambient temperature met the stated specifications for the product, and it worked. The only negative feature is the color, which does not match the color of concrete at all - it stays very bright.

This is great stuff. I sealed all the cracks in my driveway.

This is very easy to use with the right easy caulking gun it levels right out and dries quickly I'm buying another case to finish my driveway

Amazing stuff. Here in Florida and cracks are still solidly filled after one year! Very impressed.

I bought two. First cartridge was fine. The 2nd cartridge plug was not very well sealed. I lost a full cartridge and my applicator. Besides that, product works fine.

Easy to use fixing my cement cracks!

Good product although a little expensive for the application

solo que no hay manera de ver la caducidad del producto, lo mandan muy limitado

Same as the stuff I buy at home depot and works great for filling in cracks in concrete. Self levelling which is perfect for horizontal surfaces. Used some sand afterwards to improve the colour match to my concrete surface.

Llegó prácticamente seco

Facile à appliquer et se nivelle bien .Bon produit le recommande