Expansive Demolition Grout 44 Lb. Box for Rock Breaking, Concrete Cutting, Excavating. Alternative to Demolition Jack Hammer Breaker, Jackhammer, Concrete Saw, Rock Drill (DEXPAN44BOX1 (77-104

Does not disappoint. Have bought several times. Use according to directions and we break hard blue rock every time. Don't breathe the dust. Be patient for 24-48 hours, as it continues working. One can hear the rock break!

Dexpan Expansive Demolition Grout gets the job done. We used it for 2 different applications and it really impressed us on its performance both times. The main reason we were using the Dexpan was to demolish a small concrete pad in a location where it would be difficult to use large tools. The holes were drilled per instructions and the grout was mixed per instructions. After mixing it has a soup like consistency. After pouring the grout into the holes, we left it for about 16 hours before checking on it. The pad was completely demolished and the concrete floor beneath the pad was left undamaged. Clean-up was just as easy as using the product. For the second application, we used it to break a large boulder on a hillside that needed to be removed. The same process was done as we did in the first application and the next morning, the boulder was broken up into pieces small enough to carry by hand. Overall, it is a great product that works very well. The main benefit being that it saves time and money by eliminating the need to use heavy equipment and tools. It is very simple to use and is very effective following the instructions for use. The only thing of concern is that it has a very high PH making it a dangerous substance to use and can be harmful if it get on the skin. However using proper personal protective gear such as rubber gloves and safety glasses mitigates the risk. It also washed off the skin with soap and water. I highly recommend this product for its intended use. It is easy to use, effective, and save time and money.

I'm putting on an addition to our house. When digging the hole for the foundation, we hit ledge about 6 feet down. This would have severely limited our basement ceiling height. The ledge consisted of a mix of gray NH granite and some insanely hard black rock. I had to take off about 1.5 feet of ledge to get to a 7 foot basement ceiling. We will end up owing the excavator about $1000 in machine time for beating on it with the hammer he has on his skid steer. A larger machine was not available. For that machine time, we took out the two highest peaks, but the vast majority of it remained. So I gained about 1/2 foot this way. The excavator did not have any good solutions for me. I went on the web and found Dexpan. Watched a few youtube videos and convinced myself that I had a shot at this. The excavator and foundation guys were both very skeptical, but hey, when you're desperate, you'll try anything. The first day I drilled 30 holes as a test. The next day I saw a few cracks appearing. I ended up drilling about 120 3/4" holes 10 inches deep each. Holes were drilled about 6 inches apart, and were carefully chosen to take advantage of existing fracture lines in the ledge. Took about 8-10 hours of drilling time. The Dexpan succeeded with cracking up the ledge to the extent that the excavator could come back with his skid steer hammer and bust it all out in about an hour. I got an additional 1 foot of ceiling height out of this and now we are finally ready to pour the foundation. DEXPAN ROCKS!!!!! Forgive the pun. By the way, I think I would have been better to have ordered lower temp range Dexpan. Some of my cracks took a couple days to even start. I think with the lower temp product, it would have gone faster.

Amazing product

Three packs out of the four were enough to fill 20 holes 1-1/2" diameter and 12" deep. Holes were drilled on 12" centers. Cracks in the rock started to appear after about four hours. The photo was taken six hours after filling the holes. Note, poke some wire down the holes after pouring the mix to ensure there are no air bubbles in the holes.

For an entire day I beat on an old set of steps, 3' thick, 5' x 5', with a jackhammer. Got nowhere. Used this stuff, 24hrs later the block was broken. Awesome!

I have poured 176# into 120 1.5" holes. Pics only represent a small portion of the job. Follow direction by using a 1.5" Bit, (The area of a 1.5" is 225% of a 1" bit and area is the important fact in this process) It is a lot of work drilling the holes but a pilot drill helps. Rent bits, Amazon Bits ALL broke on Day 1. It says to only drill 80-90% into the rock BUT on buried rock you will not know were that is. If you drill through that hole may not fill. Wait 24-36 hrs as it continues to expand, in fact you can re-water to increase expansion. You can see the drilled holes in the last Pic. The last rock split and removed weighed 2,000# This product works if the proper product is selected and instructions followed.

I used this in the middle of summer so I bought the highest temperature rated version of Dexpan to break up some large boulders and bedrock outcropping in my backyard. After I learned how to use it properly, this product broke up the large boulders into pieces small enough to haul away in my truck. You have to read and follow the instructions carefully for the best results. If you mix it too thick (which I mistakenly did the first time) it may blow out the top of the hole instead of cracking the rock. I recommend using a paddle drill to mix this stuff. Be careful not to get it on your skin. Also, it works best if you have the drill holes properly spaced. I would also recommend using a drilling depth gauge. When drilling some of the boulder holes I accidentally went to far and drilled through the other side! If my drill had a depth gauge it could have prevented that. I would give Dexpan 5 stars but am deducting 1 star because I think it is expensive.

This product worked great for breaking apart a huge Canadian shield rock (a combination of granite and other rock materials) in our basement sized about 4 ft x 24 ft. We initially followed the instructions on the USA website, but it didn't work as fast/well as we'd hoped, so we checked out the CDN site and found out we were mixing it incorrectly. As soon as we started mixing it correctly, before pouring it into the drilled holes, we were seeing initial results before 24 hrs and after 48 hours, the rock was cracked & breaking apart easily. It took my husband a full month & a half after work & weekends to break it almost completely apart. Last pic is from 2 weeks ago, we are further now. We have just a bit left at the narrow 2 ft part & a bit around the edges. We are happy to almost reclaim a huge amount of square footage in our basement that we will use as a rec room in the near future. Great product, highly recommend.

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Excelente

Produits efficace et livraison rapide

Love this product ! Really worked as indicated!