Ultrabond A9-1 Ez-Mix System Epoxy Adhesives, 9 Oz.

Had to attach a lot of all thread to concrete. Only other option I could find was expanding inserts, which would've cost more and required a lot more time to install. This epoxy is cheaper and faster than mechanical methods of attaching steel to masonry. 3/8" all thread epoxied 2.5" into concrete did not pull out with 6 tons of hydraulic force. Works for me.

Excellent product used to secure studs for light poles in concrete around our pool.

Worked as expected. Hard to disburse with normal caulk gun though. Holds very well.

For starts, this stuff is 3-4 times stonger than concrete. I couldn't believe it! This is a heavy duty construction adhesive not to be confused with the "playschool" variety you'll often find at DIY stores. I had to call them to find a local distributor. I had used metal anchors in concrete in the past for various applications but they all eventually pulled out. I heard about this stuff from a contractor so I tried it. If you use this to anchor bolts or threaded rod in concrete they will NEVER come out. The concrete will break before this adhesive fails. Great product!