Neumoisture Intensive Masque, 200 ml

Does this product have a safety seal on it when it comes in? Mine didn’t have one just checking

Can this hair mask be used a regular conditioner 2-3 times a week, leaving it on the hair for 1-3 minutes in the shower instead of longer?

Can you use this as a leave in conditioner

Instructions please!! How to use this is it rinse out or leave in?