Scarva Clay Release Agent From  £2.82

I thought it would be a powder, due to the 'brush off' sentence, but it is a liquidy oily substance. You need a very small amount for it to work in a silicone mould. Too much and the clay glides off the mould. The clay does not stick, perfect! But the excess clay sometimes gets some of the release agent on it. I just kneed it through and use the clay again, but don't know yet of that is going to be a problem.