
3M™ 431 is a high-quality aluminum tape designed for applications requiring reliability, durability, and resistance to extreme conditions. Thanks to its heat and light reflective properties, the tape effectively protects temperature-sensitive surfaces and increases the efficiency of heating and cooling systems. It is characterized by low water vapor permeability, making it ideal for sealing, patching, and moisture protection.
The tape adheres perfectly to curved and uneven surfaces. It is resistant to UV radiation, flames, aging, and adverse weather conditions. Its exceptional adhesion and clean removal make it suitable for both indoor and outdoor applications.
Technical specifications:
• Width: 50 mm
• Length: 55 m
• Thickness: 0.09 mm
• Carrier material: aluminum
• Color: silver
• Operating temperature range: from –53°C to +148°C
• Adhesive: acrylic
Application:
• Reflecting thermal radiation and light
• Thermal shields and increasing lighting efficiency
• Sealing and patching (also in the presence of moisture)
• Installation and insulation work in the HVAC industry
• Protection and joining in heating and cooling systems
• Indoor and outdoor applications requiring resistance to atmospheric factors
Benefits and properties:
✅ Reflects and dissipates heat – protects temperature-sensitive materials
✅ Excellent sealing – low water vapor permeability
✅ High resistance – UV, moisture, flames, weather aging
✅ Surface conformability – even on curved and uneven surfaces
✅ Wide temperature range – reliable in extreme conditions


















