I've bought some RTV silicone for a few molding projects but I'm trying to make it last, so I have a helmet I'm planning on molding and slush casting and was trying to save silicone.
What I was thinking was painting on one or two layers of regular RTV silicone and then building up the middle layers with silicone caulk before finishing off with a final layer of RTV, effectively making a caulk sandwich.
Would this method be wrought with issues with the mold? Since it's a helmet, if I were to use RTV for the whole thing, I'd need to thicken it up whereas the caulk would be the right consistency right out of the tube. However, I've used caulk for molds before and while it works, the molds tend to tear after a few uses so I was wondering whether the RTV it's encased in would help the stability.
What do you think?
What I was thinking was painting on one or two layers of regular RTV silicone and then building up the middle layers with silicone caulk before finishing off with a final layer of RTV, effectively making a caulk sandwich.
Would this method be wrought with issues with the mold? Since it's a helmet, if I were to use RTV for the whole thing, I'd need to thicken it up whereas the caulk would be the right consistency right out of the tube. However, I've used caulk for molds before and while it works, the molds tend to tear after a few uses so I was wondering whether the RTV it's encased in would help the stability.
What do you think?