Red Devil 0644 Concrete Repair Patch, Cement Crack Fillter, Pre-Mixed, 1 Quart, Pack of 1, Gray, Made in USA

The Red Devil 0645 Concrete Repair Patch is one of the most practical, no‑nonsense crack fillers you can keep on hand for fast structural touch‑ups. The pre‑mixed formula is the real advantage here—no measuring, no dust, no mixing ratios to get wrong. You squeeze it out, tool it into place, and it immediately behaves like a proper cementitious filler rather than a thin caulk. It adheres well to concrete, masonry, mortar, and even works for filling small holes in stucco, making it a versatile repair option for both interior and exterior surfaces. Once cured, it dries to a hard, sandable finish that blends cleanly with surrounding material. For hairline cracks, it flows smoothly enough to fill without shrinking; for wider gaps, it layers without slumping. The 5.5‑oz tube is ideal for targeted repairs like steps, patio cracks, foundation lines, garage floor blemishes, and small stucco imperfections where a full bag of patch mix would be overkill. Cleanup is simple with water while still wet, and the cured patch accepts paint without flashing or discoloration. If you need a reliable, ready‑to‑use filler that performs like a small‑scale concrete patch without the mess of mixing, this tube delivers consistent, repeatable results.

Going to be needing another tub if this AWESOMENESS! We just moved into this house not long ago and the garage floor was pitted and flaking and doing all sorts of other crazy things. I was bound snd determined to at least fill the low spots in but didnt have a clue what to use. I came across this stuff here on Amazon and thought I wouldntry it. Worked beautifully. I still have a few pits to fill in, dont want a completely smooth floor as I want it rough like to look like a medieval floor. That garage is getting closed in and made into a huge pantry with butcher block island and shelves out the ying yang, so, yesh, this stuff fills too deep pits but keeps the rough aged look Im wanting. Anyway! Love this product! Was so easy to lay down, not messy at all

Seems like a good product when you don’t want to hassle with mortar/cement mix. Agree with one reviewer who said product doesn’t come out of the tube without a good bit of effort. I think this is partly due to the water content in this pre-mixed variety, which seems pretty low. I didn’t add any water before applying and I also decided to use my fingers to work it into the block foundation I was repairing. That work nicely, much better than the spackle knife/trowel. My trick to get the product out of the tube if you have trouble is this, cut the nozzle as close to the main tube body as you can, use your foot with a shoe or boot on and then slowly apply pressure and product will easily dispense with your weight. I then used my fingers as needed to apply, but you could try applying with a tool. I just found that not great with this mix and cleanup is easy with water so no worries. I did detect a smell of slight acetone or something, I assume something which makes the cement more pliable to get it out of the tube. It’s not real strong but it is there. I would buy this again. I used 3-4 full tubes on my project and since I bought the 12 pack, I have several left. I would recommend using a whole tube at a time as concrete could be very tough to work with after recapping. I have a trick there too. I always take a little cling wrap and put it over the nozzle, then put a small rubber band around that toward where the nozzle meets the tube, only then do I cap it. That seems to typically keep all my tube caulk/cement pliable a long time after resealing. Hopefully product will dry fully and give me many good years of secure foundation.

Worked great to cement my dragon's ear back on his head. You could see "the scar" and since dragons have scars that was ok. But this dragon is a Tween so I bought some children's waterproof bandaids with aliens on them to put on the scar. Makes my Tween Dragon even more charming :-)

I recently used this concrete patch to fix some cracks and holes in my driveway, and I’m very impressed with the results. The product was easy to apply, and the instructions were clear, making the whole process quick and straightforward. I simply mixed it with water, applied it to the damaged areas, and smoothed it out with a trowel. Once dried, the patched areas looked seamless with the rest of the concrete. The texture matched my existing surface well, and it even withstood some light foot traffic within a day or two of application. What I really appreciated was how durable the patch is—it’s held up well even through rain and temperature fluctuations, without showing signs of cracking or peeling. The concrete patch has also helped improve the overall look of my driveway. It filled in the gaps perfectly and made the surface look a lot cleaner and more uniform. It’s been a great solution for minor concrete repairs and is something I’d definitely use again for future touch-ups. Overall, I highly recommend this concrete patch for anyone dealing with cracks or holes in concrete. It’s an affordable, easy-to-use solution that delivers long-lasting results.

I found the product to be okay overall. The paste itself works well once mixed, but squeezing the tube to get the paste out is quite difficult. I had to apply a lot of pressure just to get a small amount out of the tube. I usually add a little water, mix it thoroughly, and then apply it to the wall or any surface I’m working on. The results are good once applied. However, after closing the cap, the tip of the tube often dries out. I have to clear the dried paste with a pin before I can use it again, and then apply it using a roller. Overall, the product works well, but it requires a lot of manual effort and patience.

This may not be as cost effective as the concrete that you can apply with a caulking gun but you can stick this nozzle down into a crack and it will really get in there. Much less waste involved. Red Devil is an old and trusted name.

SUPER, masilla en tubo para reparar cemento o yeso, es moldeable y seca en horas, los resultados son impresionantes, pues queda fuerte como si fuera cemento

Not cheap, bud does a good job without too much or surface prep. Sticks well and solidifies with no cracks

Works well and strong

I ended up dumping all the tube cement into a container because it was hard to not have the tip drip out cement everytime i squeezed.

Very happy with this product. It worked perfectly to patch a concrete wall and also the concrete dining table