Originally Posted by WhyFi

Ouch. I had been using regular Orange Seal, but recently moved to the Endurance blend. When I checked my sealant levels before a road trip in July (on which I'd be bringing the bike), I realized that it was the first time that I'd checked since I'd installed the new tires in late October

...and the sealant was still fine.

....though, in fairness, the wheels didn't do much between Dec and Mar, other than get sloshed around a bit each day, when getting the bike on/off the trainer.