Hey Brian, was going to post this question, but tell me what you think: Lately some of the slabs I've been wet casting has not turned out like my sample. Tried to keep my ratios consistent and all, but I'm getting a lot of crumbly corners. I wait for 4 days before I unmold, but the corners are breaking off when I grind.
I use basic Quickrete sacks, BORG acrylic admix, and I keep the admix ratio pretty high (>50% volume). My mix is runny oatmeal consistency, in fact, when I level out the mold, there is a bit of water that comes to the top. Am I just not waiting long enough to work it? Thanks.