Thanks to you all.
Actually I was hesitating at first to purchase a good thermal paste. I finally made a big mistake in purchasing the vio thermal paste, then I recently made a purchase for the Noctua, artic silver 5 and ic diamond thermal paste to be able to compare in between them, I've got enough for lifetime lol and hope it will not expire as Im intending to keep them. Is there a specific temperature to keep a thermal paste in its packaging if its not opened yet? or will it go bad if not opened and kept for a long time?