I think you should take a look at this post, and the link within, before recommending using 242 on plastics...
Bacchus : Something I never really thought about a whole lot but, aren't all loctite compounds designed to be used on metal parts? Does loctite make a product meant to be used on certain plastics?? Just curious. Bake? My little engineering friend???
That would be Loctite 'Assure 425'....designed especially for low strength locking of plastic fasteners or metal fasteners in plastic assemblies. Its kind of blue also....
Here's the
PDF for what is commonly referred to as 'blue' loctite (242)....note on page 2 explains the incompatibility with plastics.
FWIW, the product commonly referred to as 'Red Loctite' (262) is incompatible with plastic also...
There are a dozen or more threadlocking products made by Loctite.....those are just the most commonly used in the consumer market.