Loctite Threadlockers and many plastics lead to very sad owners. With ABS plastics it slowly disintegrates the plastic which begins to crack, then crumble.
Never EVER apply Loctite directly to plastic, and I strongly recommend you NEVER use it on any fastener that even passes through plastic and into a metal part. It is just not worth the potential grief.
We report this information in various threads here every year, but inevitably we see sad stories from some people who just do not get the message.
Goose