Fireball Lures Posted August 3, 2003 Report Share Posted August 3, 2003 Hey guys anyone here made a mold from RTV have any do's and don't for me? I'm getting ready to do my first RTV mold and I don't want to screw anything up if I don't have to. Nathan Quote Link to comment Share on other sites More sharing options...
earthworm77 Posted August 3, 2003 Report Share Posted August 3, 2003 I have and I can tell you that you would be better off doing the silicone mold thingy that was demonstrated by Gator. This stuff is too expensive and the results don't justify the price. Quote Link to comment Share on other sites More sharing options...
redg8r Posted August 3, 2003 Report Share Posted August 3, 2003 the silicone mold thingy I like that name.........we should call it that Hey Nate, What kinda molds you wantin to make? 1-part (w/ flat bellies) or 2 part? Quote Link to comment Share on other sites More sharing options...
Fireball Lures Posted August 3, 2003 Author Report Share Posted August 3, 2003 Just a single part mold I have 11lbs of RTV here so I've already spent the money lol so I'm going this route. Flat belly single part mold, have you made any 2 part molds out of this? Nathan Quote Link to comment Share on other sites More sharing options...
The Drop Shot Store Posted August 3, 2003 Report Share Posted August 3, 2003 What is your master made of Nate? I can give you specifics after I know what "medium" you are working with. And in my opinion for small production one peice molds, nothing beats the ease of handling of silicone RTV. As in any type of casting, how good your master is determines how good the finished product is. Quote Link to comment Share on other sites More sharing options...
redg8r Posted August 3, 2003 Report Share Posted August 3, 2003 Yup, one part molds are great to start with, you shouldnt have any problems as long as you have a good master to work with & a correct mix ratio. RTV will pick up every detail, so just make note of that, Also keep accurate measurements on the a-b mix ratio, hopefully you have 1:1, but if not, a set of scales or good measuring cups spoons definately help. I use 3 different kinds, a 1:1, a 10:1 & then an 20:1 i use for casting lead. you'll need to anchor the master in the container somehow, like Bruce said, that will depend on the material its made from, as long as its not porous, you wont need a mold release/sealer, the glossier the better. always pour in the lowest spot & let the silicone slowly rise up around the master. Sometimes when I do a intricate mold, I"ll use a disposable brush & lay on a thin coat, then pour. good luck Nate Quote Link to comment Share on other sites More sharing options...
