Polyken 345SW Premium Self-Wound Foil Tape | Speed Tape | FAR 25.853(a) | AMS-T-23397B | Gulfstream GAMPS 4002

The aerospace and defense industry's trusted premium speed tape — a heavy-duty dead soft aluminum foil tape engineered for aircraft sealing, masking, heat shielding, and vapor barrier applications. Approved by the FAA, Gulfstream, and the US Military, with a self-wound construction that eliminates release liner waste and delivers smooth, tangle-free unwind in demanding MRO and manufacturing environments. Polyken 345SW is a 5 mil premium self-wound aluminum foil tape with a high-performance acrylic adhesive. Its dead soft foil backing conforms to irregular surfaces and contours while providing an effective barrier against air, moisture, and corrosion. The solvent-resistant acrylic adhesive bonds aggressively to most surfaces and removes cleanly without leaving residue — making it ideal for both permanent sealing applications and temporary masking operations during paint stripping and electroplating.

Key Features

• Heavy-duty dead soft aluminum foil backing — Smooth, easy unwind; conforms to irregular surfaces and complex contours
• Air, moisture, and corrosion barrier — Provides reliable environmental protection for aircraft structures and duct systems
• Heat shielding — Minimizes heat transfer and eliminates hot spots in industrial and aerospace maintenance applications
• High-performance acrylic adhesive — Excellent bond to most surfaces; solvent resistant with outstanding high temperature performance up to 350°F
• Clean removal — no residue — Permits easy removal without adhesive transfer, essential for precision aerospace masking
• Self-wound construction — No release liner; minimizes waste and simplifies application
• 24-month shelf life — Long shelf life for MRO stockpile and depot storage
• Multi-spec approved — FAA, Gulfstream, SAE, and US Military certified

Applications

• Speed tape for in-service aircraft repair and sealing
• Window masking to protect aircraft canopies, windshields, and passenger window surfaces from crazing or hazing during paint stripping operations
• Aircraft sealing and masking during maintenance and overhaul
• Heavy-duty vapor barrier sealing for sheet metal, flexible, and fiberglass duct systems
• Insulation seal, patch, and repair
• Composite repair and manufacturing
• Masking tape in paint stripping and electroplating applications
• Heat shielding and elimination of hot spots in industrial maintenance
• Diversion trough for wash-off of paints and chemicals during stripping and painting processes
• Condenser and evaporator fastener in appliance and refrigeration applications

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 date of manufacture at 60–80°F, 40–60% RH

Certifications & Approvals

• FAA — FAR 25.853(a) / FAR 25.8539(a)
• SAE — AMS-T-23397B (supersedes MIL-T-23397A & B)
• US Government/Military — L-T-80B / MIL-T23397B
• Gulfstream — GAMPS 4002 Section 3.1.2.5.1 / GAT100BC
• Tested in accordance with UL 723
• Certificate of Conformance available upon request