Guys, need some help with GS

[Hosea]

I had a pack of green stuff, it is at least 4 years old. The package is unopened and I put it in my frawer, never get it sunshine exposed.

Last nite, I try to mix the yellow and blue stuff together, and the green stuffs was patching the holes and so on, but after 5 hours, when I use my fingers slightly press the green stuff, they are still kind of soft.

What is wong with it?

Pls help me I worry about my cute little dragon now.

[Demi_morgana]

I had similiar situation - I also used some old greenstuff...
looks like it can loose it's properties after long time
You can try adding more blue than yellow stuff - it should be harder... but I'd recommend You buying new greenstuff

[Nameless]

4 years? I had "younger" stuff and it started to loose its properties. I don't think, that even fridge would help for that long.
The additional problem with gs stripes is that blue and yellow part are connected, thus chemical reaction starts and gs cures by itself .

[Trovarion]

If you use it for gap filling throw it away and get some Tamiya Quick Type putty