Expansive Demolition Grout 11 Lb. Bucket for Rock Breaking, Concrete Cutting, Excavating. Alternative to Demolition Jack Hammer Breaker, Jackhammer, Concrete Saw, Rock Drill (#1 (77-104 F))

Used successfully to break up some large boulders in the garden. Did require some hard work to drill the holes to accept the grout but got there in the end.

We expected to demolish the colomb fadter as show in the video but it give 10% only

They suggest 1- 1/2" hole dia, but my 1" holes yielded better than expected results. I've used 3 buckets of the stuff this week. Note* Mix well and mix again and again. It really settles in the bucket no matter how fast you work. Mix 1- 1/2 litres of water in the original bucket if you are using all of it. I fill about 20 -25 x 1" dia 8" deep holes with 1 bucket. Drill more holes than you expect to use, as this stuff doesn't keep long. Will use more of this stuff earlier and save a LOT of tedious work w the feathers next time.

After drilling the holes and adding the Dexpan I let it work for a week. Everyday I would check it and notice cracks in the rock getting larger. It may take several applications for larger rocks.

A safe and effective way to break up rock. I had a troublesome piece of shale in my driveway. I was unable to use heavy equipment to remove it due to a buried cable nearby. I drilled a series of 1-inch holes, ten inches deep on an eight-inch grid (about 30 holes total) then filled with the Dexpan slurry. In 12 hours, the rock was completely shattered and easily removed by hand. I was able to use a funnel to fill the holes as the mixed product is about the consistency of pancake mix.

We needed to demo a very old and hard cinder block vertical wall that our 18v hammer drill wasn't touching. I think it just is not good for this application, and I'd suggest a pass to others for block walls. Although for the most part it was due to the hollow area in the cinder block, even where we were able to get drilling in the solid areas, the Dexpan just seem to dry out to fast. We kept trying to add water, isting it with hose poking small holes into it and drizzling in more water, but it was a fail for us. Had Dexpan had information advising against effectiveness on cinder block we would have passed, so 1 star lost for lack of application information on a very common wall type. 1 stars because of how fast it dried out and no instructions advising to pre-wet old/dry concrete. If you try this on another type of cement, I advise soaking the cement and holes a bit so it doesn't immediately suck all the water out of the dexpan. In the end we rented an 11 lb corded hammer that helped us with the job by targeting grout lines. A 20 lb rental would have sped it up in retrospect but it was so heavy we wet smaller. Our wall was maybe about 60-80 sq ft of block area. With the rental it took about 5 hour to knock out, one on the electric hammer and another swinging a small hammer once grout lines were broken up some (our local store was out of real sledge hammers, which additionally would have been a time saver). Tough jobs, wish you the best.