rockslide Posted September 6, 2019 Report Share Posted September 6, 2019 anyone ever duplicate an rtv mold? i have one i need to make about 4 more copies out of! Quote Link to comment Share on other sites More sharing options...
mark poulson Posted September 6, 2019 Report Share Posted September 6, 2019 Try using POP, with a little yellow carpenter's glue added for strength, to make hard masters that you can then use to make additional RTV silicone molds. Seal the hard master with something like diluted epoxy before you make the silicone molds. 1 Quote Link to comment Share on other sites More sharing options...
JRammit Posted September 6, 2019 Report Share Posted September 6, 2019 I make all my mold boxes out of foam rubber sheeting, usually can find it in the craft aisle in Walmart for about 30 cents a sheet.... its fairly tough, flexible and will make a water tight seal when superglued together I just flip the mold box inside out to remove the finished mold, then flip it back and refill with silicone to make another mold... this process can be repeated over and over, ive only had one tear so far (the craw jig trailer mold), but it can easily be repaired with superglue Quote Link to comment Share on other sites More sharing options...
rockslide Posted September 6, 2019 Author Report Share Posted September 6, 2019 thanks for the help everyone Quote Link to comment Share on other sites More sharing options...
Roger Linnell Posted September 7, 2019 Report Share Posted September 7, 2019 (edited) I've used rtv to copy aluminum molds and made Ultra Cal molds from the rtv molds Edited September 7, 2019 by Roger Linnell Quote Link to comment Share on other sites More sharing options...
