Len Woodruff Posted May 6 Share Posted May 6 I need to make a mold of the side vents on a rare 66 Corvette. I don't want to cutup the body to do it. Can I build a dam around the vents or something like that to make the mold. Any help and pictures would be great. Thanks in advance for your help. Quote Link to comment Share on other sites More sharing options...
68shortfleet Posted May 6 Share Posted May 6 (edited) Yes, entirely possible to just build a small dam around the area of the vent and pour the mold silicone into the area. Edited May 6 by 68shortfleet 1 Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 6 Author Share Posted May 6 1 hour ago, 68shortfleet said: Yes, entirely possible to just build a small dam around the area of the vent and pour the mold silicone into the area. Thanks. Any suggestions for holding the dam on the side of the body? Quote Link to comment Share on other sites More sharing options...
68shortfleet Posted May 6 Share Posted May 6 The molding clay I use is tacky enough that it will "stick" to the body. Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 6 Author Share Posted May 6 4 minutes ago, 68shortfleet said: The molding clay I use is tacky enough that it will "stick" to the body. That sounds like a perfect solution. I will give it a try in a couple of days and report back. 1 Quote Link to comment Share on other sites More sharing options...
JollySipper Posted May 7 Share Posted May 7 (edited) When I first saw your question, I thought of Bill, @Ace-Garageguy and his using real sheet fiberglass to do things such as this......... Maybe he'll join in and offer some advice. Edited May 7 by JollySipper 1 Quote Link to comment Share on other sites More sharing options...
CabDriver Posted May 7 Share Posted May 7 (edited) I don’t know if you HAVE RTV resin already for this project, but I’ve seen people use this stuff for similar projects: https://a.co/d/iRP3Ka4 Benefit is, you roll it into a ball, press it onto the thing you’re replicating and then it hardens whilst maintaining it’s shape - no need for dams or boxes Edited May 8 by CabDriver 2 Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 7 Author Share Posted May 7 8 hours ago, CabDriver said: I don’t know if you HAVE RTV resin already for this project, but I’ve seen people use this stuff for similar projects: https://a.co/d/iRP3Ka4 Benefit is, you roll it into a ball, press it onto the thing you’re replicating and then it hardens whilst maintaining its shape - no need for dams or boxes Wow. Thanks for the info. I didn't know about it. That would work great for 1 sided casting. 1 Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 16 Author Share Posted May 16 Here is an update. I made the side cove dam using clay. I poured silicone rubber into the dam. I now have this piece that I need to make a female mold from the male mold from this piece of silicone. Any suggestions for how to do this? Can I glue this down using silicone glue? If I can find something to hold it in place then I can use mold release to keep it from sticking? Quote Link to comment Share on other sites More sharing options...
LennyB Posted May 16 Share Posted May 16 I would build a box around this with some flat styrene just a little taller then your mold. Make sure to use mold release and then just pour on top of to make the female master. If you are lucky you can remove the male mold from the box without disturbing the female and then pour right into the box, now from the opposite end, to cast your part. 1 Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 16 Author Share Posted May 16 1 minute ago, LennyB said: I would build a box around this with some flat styrene just a little taller then your mold. Make sure to use mold release and then just pour on top of to make the female master. If you are lucky you can remove the male mold from the box without disturbing the female and then pour right into the box, now from the opposite end, to cast your part. Thanks. I was just worried how to keep it from "floating" when I poured the new rubber over it? Quote Link to comment Share on other sites More sharing options...
R. Thorne Posted May 16 Share Posted May 16 Double back tape? 1 Quote Link to comment Share on other sites More sharing options...
LennyB Posted May 16 Share Posted May 16 If it’s tight around your male master it shouldn’t float. But double sided tape or hot glue it to your work surface would also work. 1 Quote Link to comment Share on other sites More sharing options...
Len Woodruff Posted May 17 Author Share Posted May 17 I the tape tomorrow. I was also wondering about silicone sealer? Quote Link to comment Share on other sites More sharing options...
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