Sealing a plastic birdbath

I have a plastic pedestal birdbath which was supposed to be light enough to make it difficult for large birds to bathe and empty it - that didn't happen 
Anyway, the cold snap and snow have cracked it where the bowl screws onto the pedestal and I was wondering what I could use (if anything) to seal the crack?
Anybody got any experience of this type of thing?

Anyway, the cold snap and snow have cracked it where the bowl screws onto the pedestal and I was wondering what I could use (if anything) to seal the crack?
Anybody got any experience of this type of thing?
"The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it." Sir Terry Pratchett
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I think a trawl through similar products might while away a few hours!
Hopefully someone has an answer.
You can use it for potable water which means it's safe to drink.
Thank you for all your effort, just don't want more plastic in the landfill unecessarily
Well @K67 I think you cracked it. Just had an e-mail back from the Company who, obviously, won't guarantee non-toxicity in a birdbath but confirm it's use in domestic situations. Even suggested a stockist.
Thank you everyone.
Will look out for a photo of it in use!
Leak test was delayed as it rained but this has been full all morning so I am going with success. It's not pretty but it is fit for purpose