Weatherables Fast 2k Fence Post Backfill

This stuff is incredible. Easy to use and sets up quickly!!! My advice is to use it in cooler weather. I used one bag on a hot sunny day and as soon as it started to mix it expanded quicker than I could open it…..yup the bag exploded!!!!!!!!

This is the best I have ever used for sturdiness and ease of use. Five days after we reset and arranged our mailbox. New paint and all... it was hit by a delivery truck. The mailbox got knocked off but the post was just fine. No movement from it. Staying straight, level and strong!!

Simple to use. Dont go beyond 30 sec mixing. You'll feel bag get hot and bloat/ready to burst. I won't waste time with concrete for simple projects like this. Got 5 of my boys to buy it. For retractable water hose. Works awesome

Though it doesn’t seem as strong as concrete it works amazing for quickly getting the job done with a post. Very easy to use with the bag and your hands being all you need and certainly a LOT lighter than bags of concrete. So much easier for hard to reach areas where you can’t get a vehicle.

I was skeptical. I put my mailbox with a "drive-in" type post; however, it immediately began wobbling, even after I drove it deeper! The soil is loose and stony, so I wasn't sure anything would hold, cement had already failed. I saw this product and thought, why not give it a chance?Getting the plastic "divider" off was the most difficult part of the process! Nevertheless, I got it off and began mixing. The package began getting hot and expanding. After the prescribed mixing (30 seconds), I moved to the hole where I planned installing the new post and tore off a corner of the package. Surprise! The "foam" began spewing like a volcano! It got everywhere! My hair, arm, and all over the new post before I was able to direct it into the hole. I was able to finally direct the flow where it was supposed to go. I had just enough time to level the post before it began hardening. Within a couple of minutes the post was in and solid. I gave it overnight before shaking the new mailbox post, it is rock solid! I finally have a mailbox that is not wobbly.The "con" to this product is the price! The package says it replaces two bags of cement; however, two bags of cement is less than $10.The bottom line is that the product, although expensive, works. I am installing fence posts soon, but I doubt I'll be able to afford enough of this product for all of the posts.