Is the treatment safe to use on shaved / short hair? June 07, 2022 10:28 Yes, The key is to apply the spray onto the scalp so the active ingredients can get to work deep on your follicles. Related articles I am experiencing a lot of hair shedding since I started using my products? How do I incorporate Dense into my routine? What is the Dense Wash and Gro routine? Can I apply hair spray after using Dense products? Is the treatment safe to use on long hair? Comments 0 comments Please sign in to leave a comment.