I'm gluing RC-3 castings into plastic boxes and the hot glue is failing to hold them in past the first de-molding - I'm having to re-glue them before I can do another mold. I am being very careful and using a gentle flexing motion to pull the finished mold out of the box so I don't break the glue bond but it's not working very well for me. These are dedicated mold boxes for custom candy molds made from Plat 25 and are for an order I am making, one mold is a large single casting (3"x3" mold box) and the other is three small castings in a long mold box (3"x7" mold box). The problem one is the 3 cavity one, the glue on large single cavity is holding up so far.
Also I see on the data sheet for Plat 25 that cyanoacrylate (super glue) will inhibit curing so the super glue I have on hand will not be a good thing to use which is why I'm trying to use the hot glue which isn't doing good enough. So what glue would be best to use? I am also willing to pour a thin layer of the RC-3 (or something else) in the bottom to seal any cracks the glue might not get into to help prevent any Plat 25 from getting under the casting and weakening the bond when I pull the finished molds out.
I think what is happening is that the CA cures so fast that it is affecting the Plat 25 ....I've never used Plat 25, but I have used enough CA to be quite familiar with what it works well with and what it doesn't.
I have been using Aleene's THE ULTIMATE Multi-Surface Adhesive on surfaces where the CA doesn't work.....even with using Bob Smith Industries products (CA) exclusively, I still run into situations where something else is warranted. I purchased it locally at Michaels.... www.michaels.com
I've got Loctite Professional super glue and I'm not sure it's bonding right as I've timed it at a minute and it's still not curing right - still a bit wet sometimes. I've seen that acetone removes it but I've only got non-acetone nail polish remover, I wonder if that will work?
The only Aleene's I've got is repositionable and almost empty, I don't even think it has enough in it to spray properly. But I also have Loctite Spray Adhesive (also repositionable) but I've only used it for securing stencils when I spray painting shirts. I'll have to see if the Loctite Spray is helpful at all, I'm having such trouble with this one set of molds that I've got two wasted molds and on top of that the mold box cracked and I had to go to a larger mold box.