DuoDerm CGF - Square Hydrocolloid Dressing absorbs wound exudate and turns it into a gel, creating a moist healing environment. It also blocks out bacteria and other contaminants from entering the wound. This Convatec dressing works best for partial and full-thickness wounds. These include as dermal ulcers, burns, and donor sites. This wound dressing does not have an adhesive border, so it will need to be held in place with gauze or a bandage wrap.