the platinums don't often even stick to themselves if the previous coat is fully cured and the tins stick well to other dry silicones (dry meaning non leaching) but the caulking can be unpredictable due to the adhesive qualities. It mostly sticks to silicones, metal, porcelain, and glass. A cheap mold release is made of rubbing alcohol and soap then brushed on in a few thin layers. Agreed on the clay though, no issue there with normal caulking. I should mention though that if you thin it down with something that melts clay and you happen to be molding something clay, there will likely be issues besides the shrinking and oily silicone while it leaches. It might melt some detail out of the sculpt. That plus chemical resistance are some of the reasons a good beauty coat in good stuff is ideal then follow it with the super cheap stuff. Also Walmart has it by the paints for half the price of Home Depot. I hope I don't sound like I'm knocking the previous post. It just got me thinking about some more usefull details.