RTV mold from a metal model?

Hello all,

Could someone knowledgable about RTV rubber explain the process for
creating a mold for metal models?

Also, do you find cutting these molds vs cutting vulcanized rubber
any easier? Is the process pretty much the same?

Lastly, which RTV do you currently prefer and why?


Here are number of web sites for more than you will ever need to
know about casting and mould making RTV Smooth on has great videos
and are worth the cost.


Is an industrial supply for the casting industry they have good info
on their site.


Video’s of making of a mould and casting resin


Micromark has small kits for casting along with the low temp metal
to use in the RTV or to make a metal model.

The usual disclaimer apply satisfied customer

glen, been there done that, and got it all over the shop!