Artic Silver 5 - best before date?

[Raider]

I found a tube of AS 5 the other day, but when I tried to use it on a heatsink it seemed very thick and didn't spread very easily.

In comparison a very old tube of AS II spread like a dream and worked fine.

So does AS5 have a sell by date or is just thicker that ASII? Ta

 

[Raider]

As far as I know, AS5 is meant to be a lot thicker than the others.

Ok, it's just a pain in the eras to smooth out!
I usually use a latex glove to smooth it out with my finger, maybe I should try the razor blade again