Can I use a hairdryer with my products? June 07, 2022 10:28 Yes. Apply your topical spray to the head and massage into the scalp. Allow 10 to 15 mins for the solution to dry onto the scalp before using a hairdryer. When using a hair dryer please use on a low setting. Related articles How do I incorporate Dense into my routine? Is the treatment safe to use on Afro-carribean hair? Comments 0 comments Please sign in to leave a comment.