Heres the tool its a a pavers tool or bricky's. You just put it flush against the inside edge of the mold as pictured and tap it outwards gently and work your way up till there off. If you like wrap the tool with a thinnish bit of rag or just run some decent masking tape along the blade that helps it grip a bit better and less chance of damage. $5.00 i paid at a second hand shop. Always start at the ends as pictured not in the middle less chance of kinking it.

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