It might be too visible but it's possible a fine (narrow) safety chain put on by a jeweler might work. But if your silicone tie works it sounds good.
I am always fretting about safety chains on cuffs (which is not a conventional place to wear them) and bracelets so your post resonated with me.
I do hate (the look of) safety chains with a surprising passion I think in most cases it ruins the style of the piece of jewel. Otherwise it could look lovely on certain pieces.
When my bracelet is here* I will try out and post some pics if it a practicable and ok-looking solution.
*am I the only one who looks out of the window to spot the postman just the same moment I clicked ob "buy"?