Sebastian Body Double Thick Extreme Treatment 33.8 oz Step 1 -Priming Lotion - Priming Lotion: After using Thick-In Shampoo and Conditioner, towel-dry hair. Saturate hair. Saturate hair with Priming Lotion and work through from roots to ends. Massage to ensure even penetration. Comb through and towel-dry the excess. Follow with Thickening Serum. Sebastian Body Double Supports Breast Cancel Research!