Baader Machine-Grease #2 Teflon-White (-25°C–+40°C)

Can the grease be used in temperatures below the recommendation? Or, more specifically, can it be stored in below 25°C temperatures? I don’t plan on going out anything temperature below that, but my storage conditions can get as low as -50. So as long as that doesn’t ruin the grease, all is good. Also, would this be fit to use on a flextube? The tubes on my dobsonian are sticking, and I’m tired of almost forcing it down.