Recommend Metal to Metal Glue

[footnote]

Looking for a metal glue to permanently seal one of these chain links:

http://www.diy.com/departments/eliza-tinsley-steel...

Thinking about this one from Halfords:

http://www.halfords.com/motoring/paints-body-repai...

Anyone recommend this or something better?

[footnote]

Thanks all - yes - sealed meaning not to be opened again.

I'm not to worried about it being openable with a blowtorch - that's fair enough - or cuttable with bolt-cutters.

I just want it really well stuck in a way that is practically impossible to open by turning - even if gripped with pliers, wrenches etc.

[footnote]

I haven't got access to welding equipment and it could of still be cut then - I just want to close the really obvious 'weak link'!!!

I'll give araldite or JB weld a go and tighten really, really tight - hopefully that will be enough.

I suppose you never know if the joint has worked until you really go at it hard enough to break it - and I don't want it to break - so I'll probably only test it with pliers.