Mod Podge is still sticky - help!?

First of all, there is almost nothing that's *totally* safe for kids who're still into sucking and chewing things. It's best of course to find things that aren't usually truly "toxic,"or that wouldn't dissolve with spit and mouth acid, or wouldn't chip or pull off and get swallowed, but nothing much but food and clean human skin/etc, are great for very much sucking and chewing. Even many plastics aren't all that safe (or may be found to be not as safe as we thought), though some are better than others. A lot of this depends on the amount of time and strength of sucking and chewing though too, with less of each perhaps being fine for most plastics.

The sealer you've heard about for putting over permanent white glues (Mod Podge, thinned Elmers GlueAll, etc) is probably "polyurethane" since it's the toughest of the sealers, along with some floor polishes like Mop 'N Glo, etc. Those will usually keep softer adhesive plastics like Mod Podge, etc, from being sticky (especially in humid environments), and both can also be heated a short time at low temp (e.g., 225-250 F for 5-10 min) to harden them even more. All of those things are still plastics though.

Here's more on polyurethanes, brands, applications, etc, if you're interested. I'd probably suggest a water-based version of polyurethane if you use it. Some of this is assuming use on polymer clay, but most of the info would apply to any other material being coated:

http://answers.yahoo.com/question/index?qid=201006...

Varathane

http://answers.yahoo.com/question/index?qid=201203...

rebaking polyurethane or floor polishes

http://answers.yahoo.com/question/index?qid=201111...

You may also be interested in my answers here:

http://answers.yahoo.com/question/index?qid=201105...

http://answers.yahoo.com/question/index?qid=201002...

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Thanks, good information!