Hello,
is there a shelf life for release agents and wax additive solution MW. I'm having some problems with this products. Recently I used a release agent I've opened some time ago (1 year) and it didn't work very well.

I've also a wax additive I bought 6 months ago. I opened it only now and the product became solid.

Is there a shelf life for this products? A best use date after opening?

Thanks in advance