Postloc® Post Setting Expanding Foam (2 Post Kit) - Effortless Install, Unbeatable Strength, and Lasting Durability for Any Project

Our mailbox post was wobbly. We pulled out the post, widened the hole (per video), leveled pole in hole, mixed the two liquids by shaking bottle for 20-30 seconds, then poured into hole. Very easy and excellent fix! Why hadn’t I heard of this before?!!

I thought I would try the foam, instead of concrete, to fill the hole for my deck stair posts. My hole was only 12 inches deep and 12 inches in diameter, with a 4x6 post. The foam didn't even fill the hole all the way. I was left with about 4 inches of hole left that I ended up filling in with crushed concrete. On top of that, the foam split. It did seem to get very hard and held the post ok, but the post was also bolted to the stringer. I'm disappointed that the foam didn't overflow the hole, and I used an entire kit for the small hole, that should have been enough to fill a much larger hole.

Worked great and was easy. Just empty one bottle into the other. Shake and dump into hole. Expanded to fill hole in about 30minutes. It was 50 degrees f and expanded about 1 foot by 1.3 foot

Worked really well for a fence post, feels very solid easy to use. I dug a 2 foot hole 8 inches wide and set a 4x4 post and it and the foam came all way past the top of the hole about 3 inches , which was no problem because its easy to trim. PRO TIP: wedged some chucks of broken cement or rocks once your post is level bofore you pour the mix for extra estrength and riggidity but leave gaps to pour the mix all the way to the bottom of hole. the foam will expand around the chunks of cement and set extra hard. I give 4 stars only because it's expensive for the same price I could bought 7 to 8 60lb bags of cement but this product saves your back and sets quick.

I used Postloc to install a new mailbox post. The instructions were printed on the bottle -- READ THEM. You pour the contents of the smaller bottle into the larger bottle, and re-cap the larger bottle. Shake for 30 seconds to mix, and then pour everything into your hole. Within 5 minutes, it will have set into a solid mass.What you have to consider BEFORE you mix and pour: (1) how much Postloc will you need? The Amazon listing has a useful graphic. I used that to estimate quantity, and I was not disappointed. (2) How will you dig your hole? The wider or deeper your hole, the more Postloc you'll need. (3) Make sure everything is ready before you mix the bottles. You can't stop that chemical reaction. Once you mix, you're committed.I used a post-hole digger to dig a 20" deep hole that was about 7" wide. I needed only one unit of Postloc, and had plenty of foam rising up outside of the hole. It set within 5 minutes, and within 30 minutes I'd mounted the rest of the mailbox. The post is solidly in the ground, and does not move much at all when I push it.