Zero Paints 3014 2 Pack (2K) Grey Primer Set (100ml Primer, 30ml Hardener, 60ml Thinners)

For more info about Zero paints, please read Zero Paints Colour Description.pdf
2 Pack Grey Primer
Pack Contents :
1 x 100ml Primer (High Build) also known as Urethane or Polyurethane (Supplied in Glass Bottle)
1 x 30ml Hardener (Supplied in Glass Bottle)
1 x 60ml Thinners (Supplied in Glass Bottle)
Instructions
Mixing Ratio
4 Parts Primer + 1 Part Hardener + 10-30% Thinners,
e.g. 40ml Clear, 10ml Hardener + 15ml Thinners
ONLY MIX WHAT YOU NEED EACH TIME, once it's mixed it has a life of about 15/20 mins max then it has to be discarded.
Is it possible to pre-mix your 2 pack Primer then keep it in a jar for later use if not all used in one go, or is it a case of just mixing enough to do the job
NO YOU MUST NOT DO THIS, once you mix the primer and hardener a chemical reaction is started, similar to epoxy glue or epoxy putty. It will hardened within 15/20 mins, if you mixed the lot you would be wasting product and money, so only mix whet you need each time, you will quickly find the amounts you need with a small amount of practice.

Please Note: During 2020/2021 Zero Paint has struggled to get the glass bottles they have used years. Now they have swapped to PET plastic bottles after testing. Despite the obvious difference in the visual size, the new and old bottles have exactly the same capacity.