Hydrocolloid Bandages 2in × 4.8ft Hydrocolloid Roll – Grade Hydrocolloid Tape & Hydrocolloid Patch, Waterproof Wound Care Dressing, Cut-to-Size Blister Bandages for Feet & Heels. Grade Hydrocolloid Roll – Made with professional -grade hydrocolloid, latex-free and skin-friendly, perfect for wound care and blister protection on sensitive areas.