Rainbow Research Persian Burgundy Hair Henna (Pack of 2) with Lawsonia Inermis, 4 oz. - Rainbow Henna has no additives, chemicals, or pesticides. Rainbow Henna coats each hair shaft with color. Blends naturally. Fades gradually. Lasts 4-6 weeks. Smooths and seals the hair's cuticle for greater shine and body. Our custom-tailored recipes can be used for special effects, covering grey, and improving texture. Note: Henna has no lightning action.