The thing is, the brand is for floral silk plant decor. And so people use glass vases for that. It says pour equal amounts of resin to hardener in the mix. I think I am going to try to pour and mix gradually instead of one cup altogether. Maybe do a little bit at a time and let it cure, then a little more then let that cure, and so on. I emailed the panacea product company and they said it could be from the “floating” objects inside like the pearls. But even my products with no floating objects have cracked as well.