3M™ 4411B Extreme Sealing Tape is a 40-mil conformable film tape engineered for aggressive sealing on surfaces where standard tapes fail. Its acrylic adhesive bonds on contact to metals, plastics, painted surfaces, and low-energy substrates, delivering a watertight seal with strong resistance to moisture, weathering, and UV exposure. The black finish provides a clean, finished appearance alongside reliable performance.

This tape is well suited for HVAC sealing, metal fabrication, outdoor repairs, and industrial maintenance where long-term environmental resistance is critical. The conformable film construction allows it to wrap tightly around contours, edges, and irregular geometries without lifting or flagging — making it a practical choice for contractors, facilities teams, and manufacturing operations working on non-planar surfaces.

Each roll carries a tensile strength of 13 lbs. and performs across an operating temperature range of 40°F to 100°F. Cases contain 3 rolls and ship via parcel carrier.