Redken Cerafill Thickening Stemoxydine Treatment 90mlDescription How to Use Redken Thick Treat 90ml assists when scalp hairline is visible to highly visible even with styling efforts, hair doesnt retain style or is difficult to maintain volume. Benefits: Helps improve the density of thinning hair. Formula can be used on dry hair or on damp hair. STEP 1: Apply daily to scalp concentrating on roots. Divide hair in 8 sections focusing on hairline. STEP 2: Position the pipette directly at the root and scalp