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https://www.instructables.com/id/Homemade-Sugru-IMPROVED/ has a reply of:

Let's see... 1.5 units (by volume) of cornstarch mixed with 2 units of silicone. Add some kind of paint for color. OR maybe 3 units of silicone mixed with 1 unit of cornstarch. Experiment with variable ratios. Read the Wikipedia article on Sugru, learning they mix Silicone, talc and other ingredients... don't inhale or light cigarettes while experimenting, right?

And there are a metric ton of Youtube videos like this one that go into detail about how to mix it. But on that video you will see the application is for making molds, and he used various materials on the yet-to-be-solidified mixture, and after drying, pulled the objects off of it to show little to no adhesion onto those objects he is molding upon. For my purposes, I want initial moldability for a few minutes, but then "stickability" comparable for the original Sugru. Basically, I actually do want the resulting Oogoo to stick permanently to those objects I apply it to.

To accomplish this, is this simply a matter of experimenting with the ratios of silicone rubber and corn-starch, or do I also need to add in those other ingredients such as talc etc to get the same/similar level of adhesion properties?

Another way to say this: Is there a particular reason the Sugru makers chose talc over corn-starch, or is it simply a choice based upon their production costs? I speculate that DIY'ers might choose corn-starch over talc for reasons having little to do with adhesion properties (use with the resulting product with food preparation?).

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  • This doesn't seem like the venue for this question. Commented Oct 28, 2019 at 2:36
  • Interesting question, but it isn't a Home Improvement Question. Commented Oct 28, 2019 at 14:57
  • cornstarch can mold and feed bacteria, and rot away; leaving tiny gaps that harbor germs. It sounds more like you need an epoxy putty; those pliability agents will categorically prevent silicone adhesion.
    – dandavis
    Commented Oct 28, 2019 at 17:05
  • I agree that this forum isn't ideal. Perhaps the art and crafts or chemistry stock exchanges would be better choices. However, this is related to the do-it-yourself movement, hence the diy part of diy.stackechange.com.
    – bgoodr
    Commented Oct 29, 2019 at 1:46
  • @dandavis interesting observation. If my intent was to prevent adhesion, then epoxy putty does seem like something to investigate. However I'm wanting to increase adhesion.
    – bgoodr
    Commented Oct 29, 2019 at 1:50

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