So, how long does Coollaboratory Liquid Ultra last? (Delid)

[Brahmzy]

I've heard everything from this stuff hardening up and losing its ability to transfer heat to it being fine over a year later.

This weekend I want to delid my 4770K and I bought a tube of the Ultra stuff. Am I going to have to reapply this stuff a year from now? 6 months from now?

 

[mav2000]

I have delidded almost a year back and its still going strong. This is on a 3570k.

 

[Zicro]

I read that pro is better for longevity, it's what I used when delidding my 4670k.