ProFlex RV caulk

I always like to have a tube on hand. Most RV dealer will let you return what you don't use. I like proflex because it comes in colors other than white. After I use it I cover the tip with aluminum foil and place the whole tube in a zip loc bag. Last week I saw some rubber covers at Home Depot to put over the tips to keep it from drying out so the rest of the tube isn't wasted.