Elastoplast Large Blister plasters use superior technology for highly effective blister treatment on heels. These blister plasters immediately relieve pain, and seal the affected area to keep dirt and bacteria at bay. The hydrocolloid technology helps the blister to heal faster, and it's extra-strong adhesion keeps the plaster in place for days. Dermatological studies found the plasters to be skin friendly, skin compatible and offer good skin tolerance.