DAP 37584 Liquid Cement Crack Filler, 1 quart, Gray

I used this on my porch that had a crack all the way across it. This was a deep crack but not very thick. I used painters tape to mask the sides of the crack and cleaned the crack out. Then poured this into the crack. After 30 mins I came back with a wet rag and cleaned up excess product being careful not to pull up product from the crack. It is mostly hardened by then but not fully set so being careful not to pull product from the crack but from the sides to keep the crack clean looking. Doing this keeps all the product in the crack and makes the crack invisible. Great product!

Easy to use If you prep the concrete this patch will last for years

Used this on garage floor and sidewalk. Works fairly well but maybe not as well as I had hoped. It is better than the crack and has held up for the most part. Be sure to clean, clean, and clean some more before applying. Deep cracks will "suck it up" and you will be left with a divot. It will shrink as it dries.

Excellent product. Needs a lot of shaking for proper mix or it takes two days to dry. Above expectations!

Easy to use concrete crack filler. Filled all the cracks in my driveway and sidewalk. I let it dry for several hours to make sure it cured before I stepped on it, but probably didn't need that long. Make sure you shake well to mix the container before you use it, otherwise it'll be a little runny. Only downside, the bottle didn't come with a cap so make sure you use it all before it dries out.

I purchased for 2 places. There was a crack in my garage floor and in my wall. I had a hard time getting it to come out of bottle until I realized there was a covering that sealed the bottle. Once that was removed it was easy to use & spread with a putty knife. 2 hours later it was dry & looks great.

I was going to use outdoor silicone for my concrete driveway gaps, but decided to give three bottles of this a whirl. This Dap product has the advantage of being super thin when it comes out of the bottle tip (unlike silicone, which is thick) so that I can use this for finer cracks and it works itself down in there. That said, for some reason, it doesn't seem to fill the cracks well. I have sections of 1/8 to 1/4 inch cracks that I have gone over three times with this Dap juice, and it still has gaps in the crack. Agains, it's the seepage downward that is the key, and perhaps it's fine.I plan to use this for the deeper part of the cracks (it says on the bottle not to use for cracks greater than 1/2 inch wide). a couple of passes, and then clear silicone over the top of the crack with silicone canister and caulk gun.This stuff does dry in a few minutes. I can see why Amazon reviewers have mentioned that it was hard when they got it. I bought mine at a building store, so those are the three I used. I have another three from Amazon that sound good when I shake the bottle, but I will tell when I open it. You will use the entire bottle because you cannot cover it and save it, even for a half hour. So, just plan on using the entire thing before it hardens. Also, when you razor off the tip, make it smaller than you would a caulk cartridge of bathroom caulk or silicone. Why? The juice in here is thin, and I cut it too wide and it basically poured all over the edges of the cracks. Since it's thin, a small opening would have been better.Update: These Amazon bottles do not have any seal on the top. The ones I bought from a large home box store has seals inside the spout, sort of like builders' caulk or inside a new catsup bottle. Well, these were just open once one unscrews the spout top. Mine worked well, but I believe it to be slightly thicker than the ones from the home store, perhaps from being exposed to air to some degree. Amazon raised the price of these and they are more expensive than the home store by more than a buck (but there's no sales tax here). I would suggest either buying locally so you can assure freshness by shaking it to see if it's liquid and not hard and by unscrewing the spout to see if it is sealed, or buying exactly what you can use from Amazon, not a bottle more (and returning it if it's hardened already). You can always buy more, but this stuff is not going to store well.

I had a lot of cement poured all around the barn and after several months, I developed a crack from the barn to the blacktop. I blew it out real well with the blower. Use this to fill that long crack and it did a great job.