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even the hi temp RTV silicones have a melting temp of 700 intermittent, they are not intending for prolong heat exposure (read their labels), and lead melts at 650, and that's cutting it a little to close for me. all that work just to have your mold possible melt and have one hot mess on your hands...
I either do it right with a dremel and a blank piece of aluminum or two, or do it ghetto with bondo.
I would avoid ANY RTV silicone products for pouring lead (which is what mold-max is too). RTV silicone and any related product are great for making molds for soft plastics, but not lead....
bondo molds up top with a hook showing placement, pouring hole, etc, and my RTV silicone molds are on the sides, and my finished product in the center (albeit a little beat up from fishing, i haven't poured new stuff yet this winter).
i hope that helps!
Last edited by albythereforyou; 12-19-2016 at 03:29 PM..
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