Hey guys,
I have a bottle of below loctite red(263).

http://www.ebay.com.au/itm/LOCTITE-2...3D400660911601

It doesn't cure at all(even after leaving it for days).
I shook the bottle well enough to mix it.
What is going on?!?!?!?
Does it need heat to cure( I didn't think so)?!!
The bottle is few years old, but it's still should work, shouldn't it?
The bottle cap was left shut properly, so it never vented out.

Thanx