I don't think that would create any problems. I just did it because I wanted a smoother surface for the expanding foam. You really don't need to put anything between a silicone mold and the mothermold because it should release. I emphasize the word SHOULD because we are talking about MacGyver-ish moldmaking here.
Dude, thank you so much for this, I was told of this thread by Fractal, and had him post a link to this tut on my new bucket thread, I am going to use this for my Revan, Nihilus and my Mando Buckets (buckets will be 2 part molds, but so what)!!!
You'd have to thin is WAY down with something. The only thing I can think of would be a solvent of some kind, but I have never tried that and really don't think it would work. SORRY!
The silicone will work in a box mold to some extent, but its hard to get the bubbles out.
You would paint on a few layers first, to get a print coat, then after its 1/8th inch thick, just squirt it onto the item and then tap/shake it so the caulk settles.
I used it to make cap ends for my rocket pack in a pinch, it worked ok.
This is great stuff. I have a ton of this silicone in my garage after overestimating the size of my bathroom!!!!!:facepalm Never thought of using it for this. Cheers for the tips.
This last link seems to be the most helpful. Figured some more experience on this subject was needed; did some googling because I will be trying this method soon enough myself.
Enjoy! Thank you for showing us it was actually possible, Kwally.
I've got to try this. I know that people have been using off the shelf silicon, but I haven't found any good tutorials. Thanks for the post. I'll take photos of my own experience.
this is really great. I was wondering if I could use this to make molds out of leather shoes? Would I have a problem getting the silicone off the leather?