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.

Like a large tube of thick toothpaste but grainy - super EZ to apply; perfect consistency; not runny, not too thick. I’m ordering more. Color is lighter than I’d like; a light gray, not quite as dark as cement. Simple clean up. Caution though, it starts to dry rather quickly so smooth it out quickly so you don’t have to go back a second time Time will tell how it holds up, but price seems fair. So far, very pleased

Works very well. Color is lighter but works great! Dries pretty quick too.

The patch worked out well. For holes/cracks deeper than 1/4" or so, you may need to apply two or more coats after setting up. It's sandable too! The color is more of a white vs. grey. Hoping the colors will blend over time. I may need to sand a bit more and re-apply. Overall it's much better than the 1/2" hole before

This concrete patch was easy to use, durable so far, and the drying time was quick. We painted over this caulk in spots and its texture took the paint well. The first tube we bought was quite a deal, but in a week’s time, the price almost doubled.

Stuff works pretty well to fill in gaps, holes, and cracks in cement. I used my finger to "smash" it in tight places then smooth it out. I'm currently letting it dry on some outdoor concrete in the middle of February so I'm hoping it cures ok. The container itself had a cut or split in the plastic which caused a hole on the side/top near the lid, and this caused about 1/4 of my entire tub to become hard and unusable. So I'm disappointed in this obviously.

I bought the single 5.5 ounce tube of pre-mixed concrete patch to “glue” the head that broke off of a concrete duck yard ornament. I followed the directions to kneed the tube and then used it pretty much like glue. I applied the patch to both pieces and held them together for a minute or so, wiped off the excess and tried to smooth it over as best I could. It worked perfectly!!!! It held the duck’s head on without me needing to tape or secure it while it dried. It seems very strong and good. You can see the seam of patch because it’s a gray color and a little more course texture than the smooth white concrete duck I was repairing. But it doesn’t matter because I intended to paint the duck anyway. After painting the duck, it is not possible to tell it was ever broken. I am very happy with this concrete patch. It was very convenient to use, worked well, and reasonably priced. The 5.5 ounce tube is for small jobs. It’s just a little larger and wider than an ordinary tube of toothpaste—so not much patch material inside. But far more than I needed for my repair job. I posted a video and photos to show you the repair process that I used and the “after” result. I am very happy with this pre-mixed concrete patch and recommend it. I write honest reviews to help others make informed purchases because I read reviews myself and appreciate how helpful they can be. I hope that my review helped you.

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.

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

Very easy to use no mixing involved just use straight from the tub, so far so good did start raining 😮 so was worried would all wash away but still ok hopefully will go slightly darker in time but overall happy

A bit runny but settled in nicely to fix a whole previously made in the grout to run a wire.

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Works well and strong