Hydrocolloid Dressings including Hydrogel dressing, DuoDerm dressing, Sacral dressing, Tegasorb dressing, hydrocolloid dressing, Comfeel dressing, ulcer dressing, gel dressing, hydroactive gel dressing, hydroactive paste, and hydrocolloid foam. Wholesale Hydrocolloid dressings for wound care. Hydrocolloid dressings are generally used for moderately draining wounds. What makes hydrocolloid dressings unique is their soft, absorptive wafers that become gel-like over time to help with the healing process. Our selection includes ConvaTec's DuoDerm and Smith & Nephew's Allevyn brand.