using expanding foam for a mold backing
Posted: Wed Apr 22, 2020 7:06 pm
so I just poured a fairly large mold, 8x8 sq in. roughly. its a injection mold for 5 in. paddletail swimbaits. and I was a little short on the aluminum powder resin to fill above the highest point of the masters. i completely covered the surface of the parts though. I have some Expanding foam resin, the tough stuff, laying around. could i just pour that in to make a backing for the mold halves? the foam and the aluminum powder resin are all urethane based so they would bond together right? or am a wrong in thinking that? i have multiple walleye anglers chomping at the bit to buy these after seeing the results in field testing last spring. if I have to I will wait until i get more of the Aluminum resin. thats alot of money in molds and time in the masters.