3M™ 4411B Extreme Sealing Tape is a 40-mil conformable tape engineered to create durable, watertight seals on metals, plastics, and low-surface-energy substrates where standard tapes fail to bond reliably. The black colorway provides UV-resistant coverage and a clean finished appearance on exposed surfaces.

The conformable construction flexes to follow irregular contours, curved surfaces, and rough textures, making it well suited for HVAC ductwork, outdoor signage, construction weatherproofing, and industrial maintenance repairs. Anywhere a tight seal must hold against moisture, air infiltration, or environmental exposure, this tape performs where conventional options fall short.

The acrylic adhesive delivers contact adhesion rated for an operating temperature range of 40°F to 100°F, with a tensile strength of 13 lbs per inch width. Each roll measures 2 inches wide by 36 yards long, and cases are packed with 6 rolls. Ships via parcel.