Pratley Quickset putty, expires?

[goingnowhereslowly]

Hi

I found this box and I'm guessing it's over 10years old. The contents feel quite hard, if memory serves me, I remember it being softer.

Still usable, or chuck it?

 

[Jacobsroodt]

 

[goingnowhereslowly]

 

[Vilaishima]

 

[goingnowhereslowly]