"This stuff is great, mixed neat it hardens very quickly, sometimes before you've finished!
I've found that adding sand in various quantities slows the set time nicely.
When set, especially neat, it's rock hard.
I used it, as recommended in another review, when I chopped out the wall for a socket and all the brick crumbled away leaving me nothing to fix to. I packed a dollop of this stuff in, let it set and voila - a rock hard firm bed to drill and fix to."
"Never used this before, but was quite impressed. Already got a few small jobs in the house in mind where I'll be using it! Easy to mix into a thick or thin paste to suit your needs. For vertical applications, just mix it thick, grab a dollop in your hand (better using gloves) and press it into holes, cracks or gabs like putty. Mix small amounts at a time to prevent it hardening before you get a chance to use it."