345SW Aluminum Foil Speed Tape
Heavy-duty dead soft aluminum foilAcrylic5.0 mil
- AMS-T-23397B (supersedes MIL-T-23397A
- B)
- FAR 25.853(a)
- vertical Bunsen burner flammability
- U.S. Government / Military L-T-80B / MIL-T-23397B
- Gulfstream GAMPS 4002 Sec. 3.1.2.5.1 / GAT100BC
- Tested in accordance with UL 723
- Certificate of Conformance available upon request
- COC Included
Couldn't load pickup availability
Polyken 345SW is a 5 mil dead soft aluminum foil speed tape engineered for aircraft sealing, masking, heat shielding, and vapor barrier applications. The aerospace and defense industry's trusted heavy-duty foil tape, it's approved by the FAA, Gulfstream, and the U.S. Military, with a self-wound construction that eliminates release liner waste and delivers smooth, tangle-free unwind in demanding MRO and manufacturing environments. Meets SAE-AMS-T-23397B and FAR 25.853(a).
Its dead soft foil backing conforms to irregular surfaces and complex contours while forming an effective barrier against air, moisture, and corrosion. The high-performance acrylic adhesive bonds aggressively to most surfaces, resists solvents, and removes cleanly without leaving residue — making it suited to both permanent sealing and temporary masking during paint stripping and electroplating.
New to foil tape, or not sure speed tape is what you need? See our guide: What Is Aircraft Speed Tape? Comparing against 3M? See the Polyken 345SW vs 3M 425 comparison.
Key Features of Polyken 345SW Speed Tape
- Dead soft aluminum foil backing — Conforms to irregular surfaces and complex contours; smooth, easy unwind
- Air, moisture & corrosion barrier — Reliable environmental protection for aircraft structures and duct systems
- High-temperature acrylic adhesive — Aggressive bond to most surfaces, solvent resistant, performs to 350°F
- Clean, residue-free removal — No adhesive transfer; essential for precision aerospace masking
- Self-wound, no liner — Eliminates release liner waste and simplifies application
- Multi-spec approved — FAA, SAE, Gulfstream, and U.S. Military certified
What Is Polyken 345SW Speed Tape Used For?
- Speed tape for in-service aircraft repair and sealing
- Window masking to protect canopies, windshields, and passenger windows from crazing or hazing during paint stripping
- Aircraft sealing and masking during maintenance and overhaul (MRO)
- Heavy-duty vapor barrier sealing for sheet metal, flexible, and fiberglass duct systems
- Insulation seal, patch, and repair
- Composite repair and manufacturing
- Masking for paint stripping and electroplating operations
- Heat shielding and hot-spot elimination in industrial maintenance
- Diversion trough for paint and chemical wash-off during stripping and painting
- Condenser and evaporator fastening in appliance and refrigeration applications
Key Specifications
| Backing | Heavy-duty dead soft aluminum foil |
|---|---|
| Adhesive | Acrylic (single-coated) |
| Liner | None (self-wound) |
| Total thickness | 5.0 mil (0.127 mm) |
| Foil thickness | 3.0 mil (0.076 mm) |
| Tensile strength | 26 lb/in (45.53 N/cm) |
| Adhesion to steel | 68 oz/in (7.44 N/cm) |
| Elongation | 3% |
| Operating temperature | −40°F to +350°F (−40°C to +177°C) |
| Color | Aluminum (silver) |
| Shelf life | 24 months from manufacture at 60–80°F, 40–60% RH |
| Manufacturer | Vybond Specialty Adhesives, LLC (formerly Polyken / Berry) |
| Manufacturer P/N | POLYKEN 345SW |
| Country of Origin | United States |
Why This Tape Matches Your Spec
345SW vs ALF300. Both are aerospace-grade aluminum foil speed tapes qualified to SAE-AMS-T-23397B. The difference is foil thickness.
- Speed tape for in-service aircraft repair and sealing
- Window masking to protect canopies, windshields, and passenger windows from crazing or hazing during paint stripping
- Aircraft sealing and masking during maintenance and overhaul (MRO)
- Heavy-duty vapor barrier sealing for sheet metal, flexible, and fiberglass duct systems
- Insulation seal, patch, and repair
- Composite repair and manufacturing
- Masking for paint stripping and electroplating operations
- Heat shielding and hot-spot elimination in industrial maintenance
- Diversion trough for paint and chemical wash-off during stripping and painting
- Condenser and evaporator fastening in appliance and refrigeration applications
Approvals & Certifications
Available Sizes
Spec Guide
Frequently Asked Questions
What is Polyken 345SW used for?
Polyken 345SW is an aluminum foil speed tape used for in-service aircraft repair and sealing, window masking during paint stripping, MRO sealing and masking, vapor barrier sealing on duct systems, insulation repair, composite work, heat shielding, and masking for electroplating.
Is Polyken 345SW the same as aircraft speed tape?
Yes. "Speed tape" is the industry term for an aerospace-grade aluminum foil tape used for temporary, non-structural aircraft repairs. Polyken 345SW is qualified to SAE-AMS-T-23397B and FAR 25.853(a), the specifications that define genuine aircraft speed tape.
What temperature can Polyken 345SW withstand?
Polyken 345SW performs from −40°F to +350°F (−40°C to +177°C). The acrylic adhesive maintains its bond across that range, making it suited to heat shielding and hot-spot elimination in aerospace and industrial maintenance.