Professional-grade aluminum foil tape with dead soft backing and acrylic adhesive for heat shielding, thermal protection, and moisture barriers in demanding industrial applications. Temperature rated -65°F to 300°F with UL 746C and UL 723 compliance.
3M™ Heavy Duty Aluminum Foil Tape 438 is a premium high-performance industrial tape engineered for demanding applications across aerospace, automotive, electronics, and general manufacturing industries. This professional-grade foil tape features a dead soft aluminum foil backing combined with a highly engineered acrylic adhesive system, delivering exceptional heat shielding, reflective properties, and moisture barrier capabilities. The tape is specifically designed to withstand extreme temperatures ranging from -65°F to 300°F (-54°C to 149°C), making it ideal for heat-sensitive applications requiring reliable thermal protection and energy efficiency enhancement.
The 438 model incorporates a robust 7.2 mil total thickness with a 5 mil aluminum backing that provides superior thermal conductivity and heat dissipation properties. The pressure-sensitive acrylic adhesive ensures long-term durability while maintaining the ability to remove cleanly after masking applications without leaving residue. This dual functionality makes it exceptionally versatile for both permanent installations and temporary masking scenarios. The tape withstands exposure to flame, weathering, moisture, UV radiation, and various solvents, ensuring reliable performance in both indoor and outdoor environments.
Each case contains 48 rolls of 60-yard lengths at 1-inch width, providing substantial coverage for large-scale industrial projects. The product meets stringent UL standards including UL 746C recognition and UL 723 classification for low flammability rating (Class L), along with FAR 25.853(a) compliance for aerospace applications. With a 24-month shelf life and proven performance in refrigeration coils, plastic protection, seaming, sealing, and heat reflection applications, this tape represents the industry standard for professional thermal management solutions.
Key Features
- Heavy duty dead soft aluminum foil backing provides superior heat dissipation and thermal conductivity for effective head shielding in demanding applications
- Highly engineered acrylic adhesive delivers long-term durability and maintains strong reliable bond under extreme temperature and humidity conditions
- Withstands exposure to flame, weathering, moisture, UV radiation, and various solvents for indoor and outdoor performance
- UL Recognized to UL 746C and Classified by UL to UL 723 Class L for low flammability rating with FAR 25.853(a) aerospace compliance
- Heat and light reflective properties protect surfaces and enhance lighting efficiency while reducing hot spots and substrate thermal stress
Technical Specifications
| Specification |
Value |
| Product Type | Heavy Duty Aluminum Foil Tape |
| Model Number | 3M 438 |
| Part Number | 438 |
| 3M Product Number | 438 |
| 3M ID | 7010337236 |
| UPC | 00051125854849 |
| Backing Material | Aluminum Foil |
| Backing Thickness (Imperial) | 5 mil |
| Backing Thickness (Metric) | 0.13 mm |
| Total Tape Thickness (Imperial) | 7.2 mil |
| Total Tape Thickness (Metric) | 0.18 mm |
| Adhesive Type | Acrylic |
| Adhesive Thickness (Metric) | 0.13 mm |
| Product Color | Silver |
| Overall Width (Imperial) | 1 in |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 60 yd |
| Overall Length (Metric) | 54.86 m |
| Tensile Strength (Imperial) | 59 lb/in |
| Tensile Strength (Metric) | 103 N/100mm |
| Elongation at Break | 10% |
| Minimum Operating Temperature (Fahrenheit) | -65°F |
| Minimum Operating Temperature (Celsius) | -54°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Temperature Use Range | -65°F to 300°F (-54°C to 149°C) |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Rolls Per Case | 48 |
| UL Recognition | UL 746C (File E 122798) |
| UL Classification | UL 723 Class L for Low Flammability |
| FAR Compliance | Meets FAR 25.853(a) |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Heat shielding of delicate parts, Heat reflecting, Moisture barrier, Seaming and sealing, Refrigerator and freezer coil attachment, Plastic protection against heat and UV exposure |
| Usage | For industrial/occupational use only. Not for consumer sale or use. |
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