3M 427 (150-mm-Roll)

Additional Product Information

Overview

3M Aluminum Foil Tape 425 and 427 are 5 mil nominal dead soft aluminum foil tapes engineered for high-performance sealing, shielding, and masking applications in aviation and MRO environments. Designed with a durable acrylic adhesive and reflective aluminum backing, these tapes are relied upon by maintenance teams for moisture sealing, heat reflection, aircraft surface protection, and structural repairs. Their flame resistance, wide temperature range, and strong adhesion make them dependable solutions for both scheduled maintenance and AOG situations.

Key Technical Specs for 3M Aluminum Foil Tape 425 & 427

• Type: Dead soft aluminum foil tape with acrylic adhesive
• Backing Thickness: 2.8 mil (0.07 mm)
• Total Thickness: 4.6 mil (0.12 mm)
• Liner (427 only): 3.1 mil (0.08 mm) easy-release paper liner
• Color: Shiny silver
• Adhesion to Steel (ASTM D-3330): 425: 47 oz/in (51 N/100 mm); 427: 50 oz/in (55 N/100 mm)
• Tensile Strength (ASTM D-3759): 30 lb/in width (525 N/100 mm)
• Elongation at Break: 8%
• Service Temperature Range: -65°F to 300°F (-54°C to 149°C)
• Water Vapor Transmission (ASTM D-3833): 0.1 g H₂O/100 sq in/24 hrs (1.55 g/m²/24 hrs)
• Standard Roll Length: 60 yd (55 m)
• Typical Uses: Heat shielding, moisture sealing, masking, splicing, patching

Approvals & Specifications

• UL 746C (File E122798)
• UL 723, Class “L” Low Flammability (File R7311)
• Complies with F.A.R. 25.853(a)
• 3M 425 can be certified to SAE-AMS-T-23397
• Meets L-T-80B requirements
• Manufactured under ISO 9001:2000 registered quality system

Typical Aircraft MRO / AOG Applications

• Aircraft paint stripping maskant
• Temporary aircraft skin and trailer panel repairs
• Heat shielding around ducts and exhaust zones
• Moisture barrier sealing in galleys and lavatory areas
• Securing insulation blankets and cooling lines
• Splicing thin-gauge aluminum foils
• General-purpose sealing and patching during AOG response

Compatibility & Safety Notes

• Adheres well to aluminum, stainless steel, galvanized steel, and many plastics
• Apply to clean, dry surfaces above 32°F (0°C) for best results
• Low moisture vapor transmission enhances corrosion resistance protection
• Suitable for indoor and outdoor exposure
• Not intended for medical applications
• Use standard PPE including gloves and safety glasses during installation

Packaging & Procurement

• Standard 60 yd (55 m) rolls
• Available in multiple widths to suit aircraft and industrial applications
• Model 427 supplied with easy-release liner for faster field application
• Lightweight construction: approx. 0.013 lb/yd/in width (4.77 g/m/24 mm)
• Store in original cartons at controlled room temperature for maximum shelf life
• Easy to cut and conform in field maintenance kits

Why 3M Aluminum Foil Tape 425 & 427 is Chosen for AOG / MRO

• Flame-resistant and aviation-compliant for critical environments
• Strong adhesion with reliable tensile performance
• Wide temperature resistance for extreme operational conditions
• Excellent heat and light reflectivity
• Low moisture vapor transmission for long-term sealing
• Quick application for time-sensitive AOG events
• Durable performance indoors and outdoors

Practical Suggestions for Your Team (AOG Mindset)

• Stock multiple roll widths in mobile maintenance kits
• Keep 427 (liner version) available for rapid deployment scenarios
• Train technicians on proper surface prep for maximum adhesion
• Store in climate-controlled areas to preserve adhesive performance
• Use as temporary repair solution until permanent structural repair is completed

Manufacture / Aviation Spec Codes

• Manufacturer: 3M
• Product IDs: 425, 427
• SAE Spec: AMS-T-23397 (425 eligible)
• Military Reference: L-T-80B
• Regulatory Compliance: UL 746C, UL 723 Class L, F.A.R. 25.853(a)

Alternative Names & Descriptions

• 3M 425 Aluminum Foil Tape
• 3M 427 Aluminum Foil Tape with Liner
• Flame-Resistant Aluminum HVAC Tape
• Aviation-Grade Heat Reflective Foil Tape
• Aircraft Moisture Barrier Aluminum Tape