American Dream Jamaican Black Castor Oil Strengthening Hair Mask 16 oz American Dream Jamaican Black Castor Oil Hair Mask A strengthening hair mask with a nourishing blend of Jamaican Black Castor Oil, Shea Butter and aloe. Leaves hair soft and manageable, giving it more shine and less frizz, while relieving dry and itchy scalp. Application: After shampooing and conditioning, apply a generous amount to wet hair and work through to ends. Massage the scalp. Leave for 10 to 25 minutes. Rinse well. For in-salon deep conditioning, use with an American Dream Heat Treat Cap.