Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1)

I got this to secure my mailbox post in the ground. The post needed to be dug up and raised recently and I came across this product when looking for some kind of cement to make sure it stays put after this second install. It was very easy to mix up and pour out. We were mesmerized by the process of the liquid becoming the hardened foam type end result. Very cool to watch. After about a half hour, it was pretty firmed up. A bunch had come up higher than we wanted, but we covered it with rocks to hide it. It seems very sturdy after several weeks have passed. Hopefully it holds up through the winter. It was a little hard to remove from skin, so make sure everyone helping is wearing gloves too - they'll thank you later. They do include them in the package which is convenient. Overall, this was an inexpensive and quick way to do the job. I recommend. Update: it has been almost a year and it is still sturdy. No change over the winter at all. Looks like it's going to hold up just fine.

Fast 2K Fence Post Mix exceeded my expectations! I was looking for an alternative to traditional concrete that would save me time and effort, and this product delivered. The setup process was incredibly simple—just mix, pour, and let it set. Within minutes, the post was firmly in place, and I didn't have to deal with heavy bags of concrete or long curing times. I also appreciate that it expands to create a strong and stable hold, making it ideal for fence posts and other outdoor projects. Plus, it's lightweight and easy to store, which is a huge bonus. If you're looking for a fast, mess-free way to secure posts without the hassle of concrete, this is the perfect solution. Highly recommended!

It starts firming up very quickly. You want to pour it in, get as much out of the bag as possible, and without getting it on you. I used it on two 4x4 fence posts to extend our fence line a little - it was easy to mix and pour, but I wish I had one more bag, as the hole wasn't completely filled when the foam stopped expanding. It did not feel as rock-solid as concrete, but if I need to dig it out later...it'll be much easier. I also used it for a 4x4 fence post going into an older 5x5 fence gate post hole in concrete. Dig up concrete, just to pour new concrete? Try to fit new concrete in the existing hole, around the fence post? That would never work. The foam turned out to be ideal for this use case. It grabbed the existing hole and the new fence post, feels very sturdy.

I was a bit skeptical after reading the reviews, but this product worked great for my application. I was installing a mailbox post. I used a 4x4 and a hole about 12" wide and about 18" deep (yeah, maybe I should have gone deeper, but being lazy ...). I dug the hole and used the filler per directions. The post was a little further back in the hole than it should have been (so backside got less of the goo). The stuff poured easily after mixing and filled the hole well. There were some air spots near the post itself (will see what happens when things freeze). I had to cut excess around the top, but after it set, everything was really very solid. Overall, impressed with how sturdy the post is. As I say, there were air pockets around the post though, so I am a little wary about what will happen when those fill with water and freeze. Will have to wait another year or two to see how that goes. Overall, impressed. Much easier than a wheelbarrow full of cement mix.

So far so good. My replaced fence post with Fast 2K went nicely. Its early, but so far so good as I used mixed concrete for original fence close to 20 years ago. Extreme wind damage over time and Fast 2K Post Anchor Mix has a rock solid grip on post. No swaying. Tips: Follow direction, breaking tab in the middle before mixing. That cost me 30 bucks. Experience is best teacher. Bonus: My post hole was 27'' to 29" and one pack covered about 26" Just topped it off with dirt and grass. Package and "experts" say it covers .5 cubic feet but my bag almost a foot more. WOW.