Sikaflex Self Leveling Sealant, Gray, polyurethane with an accelerated curing capacity for sealing horizontal expansion joints in concrete, 29 fl. oz Cartridge

This stuff is just great! You need to fill large gaps with backer hose otherwise it will take a lot of this to fill the joints. It is easy to use and does actually self level which I love as you don't have to get your hands messy trying to spread it, it spreads itself. I've used on all my joints around my pool deck which I now plan to paint with concrete paint. It's an added value that this is paintable.

MY project is a aggregate poured porch slab with brick surround. the bricks are pulling away from the slab that lets rainwater penetrate. These surfaces are uneven so the self leveling property is great. Even if your crack is quite narrow you WILL need to stuff the crack. This comes out of the tube quite runny and is for horizontal surfaces only. I have included a picture of a crack that was quite narrow and it still ran right through. I found out that pipe cleaners worked very well for the size cracks I had , the wire in the pipe cleaner was great to hold itself in the uneven cracks and I used flat bladed screw driver to force it below the finished surface. Afterwards the Sikaflex flowed on great with no sinking in and will look great after curing. As a sidenote, for my application I am getting about 40 lineal feet of coverage out of the LARGE tube.

I had a crack around my pool between the coping and the concrete decking . This stuff is very self leveling .Use a filler such as sand to fill the crack up to within a 1/4 of an inch from the top . I recommend using a fine sand to put on top after you apply a small area . This helps with the as the aesthetics of the finished job . I used some blue masking tape on the coping to keep it looking neat because this stuff can get messy . Do small lengths at a time , maybe 8 feet . This product works and stays flexible and does the job it was intended to do . Highly recommend .

Good product rice quickly great value for the money. The durability and quality is good easy to use as crack resistant.

This product is not for sealing vertical cracks and joints, horizontal only. I have a few wide gaps between slabs in my driveway and I was told that could undermine it and cause it to sink. I got some sand and filled in the gaps, leaving a half inch depth at the top. You put this stuff in your caulking gun and then basically just pour it in. It's a little thicker than honey and it will flow and fill in the area so you don't need to be as precise as with regular caulk. Just move along, allowing the caulk to ooze out as you go. It is self leveling and self sealing because it flows and makes contact with all the sides. It is supposed to remain stretchy and keep the water out for a long time. I can't say anything about that because I only just applied it but it has dried to a rubbery consistency and it looks great.

Great product ordered 2 and one was hard!

Does a fantastic job filling driveway expansion joints. Easy to apply, self-leveling really works! I did find that you go through the cartridges pretty quick, so I used "play" sand to level the area where I was going to apply so I didn't have to apply too thick. I also sprinkled a little concrete dust on top so it would blend in with driveway. That worked but not necessary. The old rotten wood that was the expansion joint was a major eye sore especially with the weeds/grass constantly growing through.

The product itself is good, but one tube came broken and was unuseable. All four tubes were the wrong color. Instead of gray, which was ordered and on the label, the Sikaflex was beige. I didn't inspect the package carefully until the handyman came to install the product. But by then, 30 days had passed. Inspect your package as soon as it arrives. I will order again but this time, I will make sure the color is gray and the tubes are not damaged.