What is the shampoo bar shelf life? 16 January 2023 18:38 Updated The shampoo bar has a shelf life of 3 years. Related articles Will you have a conditioner bar? Will I need to wash my hair more frequently with a shampoo bar? Where are the shampoo bars manufactured? How should the shampoo bar be stored? What do I do if the shampoo bar goes in my eyes? Comments 0 comments Article is closed for comments.