BBK Posted April 28, 2010 Report Share Posted April 28, 2010 For those of you that have used RTV to make a mold. In your best guess, how many 2" wide by 3.125" long by 1.5" thick molds could I get from 1lb of RTV. Quote Link to comment Share on other sites More sharing options...
dlaery Posted April 29, 2010 Report Share Posted April 29, 2010 For those of you that have used RTV to make a mold. In your best guess, how many 2" wide by 3.125" long by 1.5" thick molds could I get from 1lb of RTV. Is this a test? try this link My link Is there is nothing taking up space in this mold, with waste I would say 2 molds Is this right? What do I win? Quote Link to comment Share on other sites More sharing options...
BBK Posted April 29, 2010 Author Report Share Posted April 29, 2010 Is this a test? try this link My link Is there is nothing taking up space in this mold, with waste I would say 2 molds Is this right? What do I win? Wow that link is awesome, I just bookmarked it. Most of the mold will be a cavity for a cut down rage craw so it looks like 2-3 molds. Thanks a ton! Quote Link to comment Share on other sites More sharing options...
BBK Posted April 29, 2010 Author Report Share Posted April 29, 2010 Wow that link is awesome, I just bookmarked it. Most of the mold will be a cavity for a cut down rage craw so it looks like 2-3 molds. Thanks a ton! Actually I just went out and re-measured what the mold box is and its 2.25" X 3.5" X .5" So I should be able to get 5.5 molds per pound of RTV. I'm not sure how I can measure the bait to take out, but I believe its almost half the mold. So realistically 7-8 molds? Quote Link to comment Share on other sites More sharing options...
dlaery Posted April 29, 2010 Report Share Posted April 29, 2010 Actually I just went out and re-measured what the mold box is and its 2.25" X 3.5" X .5" So I should be able to get 5.5 molds per pound of RTV. I'm not sure how I can measure the bait to take out, but I believe its almost half the mold. So realistically 7-8 molds? Take a container slightly larger than you bait, fill it with water to the top. If you bait floats, take something to hold your bait and push it down in the container letting th water overflow untill the bait it completely submerged. Then thake the bait out and mesaure the volume of area where there is no water. This is the volume your bait. Quote Link to comment Share on other sites More sharing options...
Piscivorous Pike Posted April 29, 2010 Report Share Posted April 29, 2010 www.smooth-on.com has calculators on the site, http://www.smooth-on.com/tools.php , the different RTVs have different densities and the calculators use the specific data and are quite accurate. I cast a gallon over 10 molds and never had any waste. Quote Link to comment Share on other sites More sharing options...
Husky Posted April 29, 2010 Report Share Posted April 29, 2010 (edited) For those of you that have used RTV to make a mold. In your best guess, how many 2" wide by 3.125" long by 1.5" thick molds could I get from 1lb of RTV. 20 gms per cu in. So that mold would make about 2 1/2. But 1" thick is more than adequate so you should be able to make at least 3. If you just barely cover the model and if it's appx 1/2 " you could back fill with a silicone/water mix. That would allow you to get See my thread on DIY a 1/2 rd...., Doing that would make appx 7 1/4 molds from that pound. PM if you need more. M Edited April 30, 2010 by Husky Quote Link to comment Share on other sites More sharing options...
