Multi-Purpose Ointment helps protect and treat diaper rash. This hypoallergenic white petrolatum formula is enriched with vitamins A and D to create a protective layer, seal out wetness, and immediately soothe rash discomfort. The DESITIN. ®. Multi-Purpose Ointment formula goes on clear. It protects chafed skin and seals out wetness, making DESITIN. ®. Multi-Purpose Ointment your trusted partner for preventing and treating diaper rash.