Casting DIY stone veneer

[spike camp]

Anyone familiar with the proper premixed concrete, suitable for pouring your own stone veneer in rubber molds?
Thanks

 

[Beendare]

We have used 6 sack mix both 3/4 and 3/8 on jobs with form panels replicating rock face. The key is to vibrate to get rid of voids and bubbles.

We used a release product from Brickform and/or Scofield

if you are making fake rocks you might want to have chunks of styrofoam or Perlite additive to imbed making it lighter