t-billy Posted November 18, 2011 Report Share Posted November 18, 2011 I had some rtv that expired last may. It had thickend up considerably,but I also had some expired thinner so I decided to try a couple LARGE size molds.Figured I had nothing to lose. I used a couple cake pans and made two worm molds with a dozen cavities each. I brushed the bottom of the pans with super glue a couple inches at a time laying out my worms as I went. Let dry overnight and poured yesterday. Since the rtv isn't supposed to bond with anything but silicone I didn't coat the pans with anything. Shoulda,coulda,woulda but..... Demoulded the first one today,Perfect. Second one...Not so much. Wouldn't budge.Couldn't get a putty knife between the rtv and the pan. 100% bonded. Doah!!! Removed it with a razor blade with limited success. Saved 5 cavities. Rtv was STUCK to any part of the pan that wasn't glued. Pan must've had some sort of silicone coating. The cake pans make great reusable mold boxes but in the future any new ones will get a light coat of vaseline as a release agent for sure. I'd have been very unhappy if that had been new rtv. Although the old stuff worked perfectly once it was thinned down. Thought I'd give ya'll a heads up and maybe save someone from scrapping their high dollar mold material. Quote Link to comment Share on other sites More sharing options...
Smallie Posted November 20, 2011 Report Share Posted November 20, 2011 What is RTV thinner? I have some Oomoo 25 that is a year + old. Part B seems okay but part A has gotten thick, if you press on it with your finger it moves. Kind of like pizza dough in a plastic bag. Will the thinner restore the part A? Quote Link to comment Share on other sites More sharing options...
t-billy Posted November 20, 2011 Author Report Share Posted November 20, 2011 I bought it at Aeromarine for use with their rtv. I don't know if it'll work with your stuff,but you can check it out on their website. Quote Link to comment Share on other sites More sharing options...
Smallie Posted November 20, 2011 Report Share Posted November 20, 2011 Thanks for the quick reply. I sent them an email. Quote Link to comment Share on other sites More sharing options...
Jig Man Posted November 20, 2011 Report Share Posted November 20, 2011 I had a similar experience with bondo. Now I spray my pans with pam. It is quicker and easier than vasoline for me. Quote Link to comment Share on other sites More sharing options...
t-billy Posted November 20, 2011 Author Report Share Posted November 20, 2011 You're welcome Smallie. Thanks Jig Man I think I'll give the pam a try next time. Quote Link to comment Share on other sites More sharing options...
Big Pancho Posted November 22, 2011 Report Share Posted November 22, 2011 Billy thanks for the information on the silicone. I have been playing with RTV silicone for the past three years and have never had anything like that happen to me. Than again I have never let the silicone sit for more than a week. I have never used aero silicone is it any good. What I have heard about it is durable and just a bit cheaper that the others on the market today. The only thing I can think of that caused the silicone to stick to the pan is that there was some sort of silicone spray that covered the pans surface. Thanks again for the info. Frank Quote Link to comment Share on other sites More sharing options...
t-billy Posted November 23, 2011 Author Report Share Posted November 23, 2011 (edited) Hi Frank. I like the Aero RTV. The stuff that thickend up sat for over a year. It worked perfect one thinned down. Easy to work with. Seems plenty durable. The mold that's seen the most use is my 6 cavity senko mold. Around 3000 baits so far and it's still perfect. I've never had RTV stick to anything before. The pan in question was brand new. Had to have had a silicone coating of some sort.----Tim. Edited November 23, 2011 by t-billy Quote Link to comment Share on other sites More sharing options...
