You can get finish preserve (argon) at Lee Valley tools or Veritas in
the US.
US:
https://www.leevalley.com/en-us/shop/tools/supplies/finishing/30268-finish-preserve?item=53Z2101
Canada:
https://www.leevalley.com/en-ca/shop/tools/supplies/finishing/30268-finish-preserve?item=53Z2101
Cheers,
I always save from one year to the next. Some store better than others,
but this Odyssey Triton holds up well, and does not settle out very fast.
Also, BTW, this is the best antifouling I have ever used.
A fact not lost on Pettit, as they are pretty proud of it.($400 a gallon!)
Defender put it on
I used Total Boat Spartan Anti-foul that I left on board for 1 year,
including one Florida summer with intense heat.
1 year later the can had buckled from pressure changes but the seal was
intact. I opened it. It took about twice as long to stir it, but it was
normal and I applied it to the hull
