Montreal Ostomy - Stoma-Tech No-Sting Osto-Paste is an alcohol free skin barrier paste to be used to fill in uneven areas around the stoma. Ostomy paste works with your ostomy wafer and it won't interfere with the adhesive. Osto-paste stays soft and offers complete skin protection. The no sting skin barrier paste can be used on irritated or sore skin and can prevent further skin breakdown. Ostomy paste can be easily removed with water and mild soap.