Yes, use 1/10 of each bottle to mix one liter of working solution, and PURGE the air from the factory packaging before you close it back up. It was packed with an inert gas at the factory.
Thanks. I noticed that the Protectan spray is no longer available. What do you recommend for purging the air? I was also considering picking up a couple of those Arkay floating lid tanks, but they're kinda pricey.