Designed to help maintain a moist wound environment. NU-DERM Hydrocolloid Wound Dressings are sterile hydrocolloid wound dressings designed to maintain a moist wound environment. The dressing material interacts with wound exudate to form a soft gel. Due to the matrix formulation of the hydrocolloid material, most of the gel is removed together with the dressing, resulting in little or no damage to the newly formed tissue.