Shelf life of Carpro Dlux?

[SR99]

What's the official shelf life (stored at room temperature) once opened?

If there's no official word, has anyone gone say 2 years after opening and the products was still OK?

 

[FUNX650]

Here's some DLux info from across the pond:
__________________________________________________

Carpro UK
Location: Edinburgh

"once dlux is opened, seal the cap back tightly, return to the ziplock bag it's supplied in, and seal tightly before storing away from strong light sources. Should last 6 months+ stored in this way".
_________________________________________________

Bob