Developed by a pharmacist and father of four, Boudreaux's Butt Paste Brand has been trusted for over 40 years by pediatricians and parents to help protect irritated skin due to diaper rash and to instantly seal out wetness. When used on a daily basis, it is also a great way to help prevent diaper rash. Boudreaux's Butt Paste Maximum Strength Diaper Rash Ointment is a thick, protective diaper rash paste with 40% Zinc Oxide and is ideal for daily prevention and treatment of moderate to more irritated diaper rash. It provides overnight protection, starts to soothe on contact, seals out moisture and helps keep baby's boo-tay dry. Boudreaux's Butt Paste Maximum Strength is free from dyes, preservatives, parabens and talc. Boudreaux's Butt Paste products are FSA- and HSA-eligible in the U.S.