What are the shelf life and care instructions of the Precision Whitening Pen by BURST? February 14, 2024 16:08 Updated When stored in a cool, dark place, our whitening pen has a shelf life of up to two years. Related articles Should I use the Precision Whitening Pen by BURST before or after I brush? Precision Whitening Pen by BURST Manual I ingested some whitening gel! Will I be okay? How big is the Precision Whitening Pen by BURST? How often can I use the Precision Whitening Pen by BURST?