So i've done a sculpture in plastaline. Sulfur based clay. Didnt do my research, bought Rebound 25. Not compatible. Ok. What is? Only thing i've found is a polysulfide rubber FMC. 500$ for 5 gallons. Little expensive. 100$ a qt. Says its not compatible with resin cast. So, i appear to be ****'d. I cant do a hard mold, obviously. So ultracal is out. Alginate is too soft and tears too easily...I was thinking if i could just get one mold out of the cast then I could do a silicone with the Rebound of that cast. I tried an acrylic sealant. I ran a few test molds and its sketchy at best. I think...im still waiting for the last one to dry and it has more substance than the others. As in, it actually seems to be curing above the plastaline as opposed to just dripping off in a gooey mass. Anyroad, ideas?