3M™ Venture Tape™ Aluminum Foil Tape 1521 CW
3M™ Venture Tape™ Aluminum Foil Tape 1521CW is engineered for cold weather performance in a variety of insulation and sealing applications. This tape bonds quickly to insulation facings, metal, and other building materials, and is designed for long-term performance in both indoor and outdoor environments. The aluminum backing provides excellent moisture, UV, and vapor barrier properties, making it a dependable choice for insulation system sealing, patching, and general repairs. 3M™ 1521CW is UL 723 classified, ensuring it meets stringent flammability and smoke standards for construction use.
Applications include: Sealing HVAC ducts, insulation facing, vapor barriers, general-purpose patching, and cold weather repairs.
- Adhesive can bond in temperatures as low as -10°F (-23°C)
- Excellent moisture and vapor barrier performance
- Conforms easily to irregular surfaces
- Designed for reliable adhesion in cold climate conditions
| Property | Specification |
| Backing (Carrier) Material | 1.4 mil dead-soft aluminum foil |
| Adhesive Material | 1.4 mil High-Tack Acrylic |
| Adhesion to Steel (D3330) | 46 oz/in |
| Tensile Strength (kPa) | 103 kPa |
| Tensile Strength (PSI) | 15 lb/in |
| Elongation at Break | 4% |
| Shielding Effectiveness (Average 300kHz - 2.5GHz) | |
| Product Color | Silver |
| Insulation Resistance | |
| Certifications | UL723 Listed 10/10 flame/smoke rating (UL File #R10984), CAN/ULC S102 classification flame and smoke rating (10/10), US Coast Guard approved (CGA #164.112/1121/WCL MED 0287) |
| Thickness (Imperial) | 2.7 mil |
| Thickness (Metric) | 0.07mm |
| Maximum Operating Temperature (Celsius) | 121 °C |
| Maximum Operating Temperature (Fahrenheit) | 121°F |
| Minimum Operating Temperature (Celsius) | -40 °C |
| Minimum Operating Temperature (Fahrenheit) | -40°F |
