Hi guys, I've searched everywhere online for a forum like this so I hope you might be able to help me!
I make concrete garden ornaments and everything has been going really well until recently. A lot have started cracking before I even get them out the moulds. Thought it may have been the heat but I think they might be a bit more to it than that. Any suggestions on what could be causing them to crack?
Also some items I've been pouring recently have started to get a white "chalky" sort of substance around the edges after they've been left to cure for a couple of days.
I'd love any advice you might have on this!
Thanks.