HARTLINE 10001 Rockite Expansion Cement 15 Min 1 Lb

Great stuff. Super easy to use. Sets up faster than I thought possible so it was perfect for shoring up my mailbox that had come loose over the years. I can't say enough good things about it.

A neighbor hit my mailbox/light post outside and it was tilting halfway over, filling it in with dirt was not enough to keep it upright.I choose this instead of concrete because it seemed less mess and hassle. It was, it's super easy to use and mix, and works perfect. My post wont budge now.I got a one gallon plastic water bottle to use as my mixing bowl, just cut the top part off. You need a throw away stirrer or spoon. You can make this as thick or runny as you want, there is no instructions.So add the powder first and slowly mix in water until desired consistency.I put 4 wooden wedges around the post and hammered them tight. Then I made half of the powder mix to be slightly runny but not too watery. I poured over the wedges and into the gaps. Let sit a few hours to harden. Then I mixed the other half and repeated the steps. I figured it was best to not have a really really deep pool that might soak into the ground before it all hardened.Now I will fill with dirt and hope no one else hits it :)

Easy to use and mix. Dries quickly.

The product is a good and it does the job. The color turns out to be a light gray and smooth but I’d like a rough for patching and anchoring it’s perfect. Great for little jobs. A little bit goes a long way. From the reviews I see most people put too much water into the mix which should be only tablespoon at a time. Remember you have 15 minutes before it starts to bond, so you do have enough time to play around and clean up while it’s beginning to dry. But it’s very important to start cleaning up immediately in your work area. OK to walk on after 30 minutes

It does not dry rock hard in 15 minutes as described. It even cracked after 24 hours. Ultimately I had to buy something else to cover that mistake. Ultimately I had to buy something else to cover that mistake

Love this stuff , has multiple uses , is rock hard in no time , light Grey color, self levels,

This product would be good for an intricate hole or design in the ground because it is so thin. And it breaks easily if you are pouring only a thin coating.

Performs as advertised. Hydrate carefully to ensure proper consistency.