Polyken 345 Silver Foil Tape
Polyken 345 Silver Foil Tape is a premium 5-mil dead-soft aluminum foil tape engineered for aerospace, HVAC, and industrial sealing applications requiring high heat resistance, chemical durability, and long-term vapor sealing performance.
Polyken 345 Silver Foil Tape (also known as 345SW) is designed for professionals who need reliable sealing, masking, and heat shielding in demanding environments. Manufactured with a dead-soft aluminum foil backing and a high-performance solvent-resistant adhesive, this tape permanently conforms to irregular surfaces while maintaining a strong, consistent bond.
Unlike general-purpose foil tapes, Polyken 345 is built for aerospace and industrial use where exposure to heat, moisture, chemicals, and vibration is routine. Its flame-retardant construction meets FAR 25.853(a) requirements, making it suitable for aircraft interiors, maintenance operations, and high-stakes industrial applications. The self-wound construction (345SW) eliminates release liners for faster application and reduced waste.
What is Polyken 345 Silver Foil Tape used for?
Polyken 345 is commonly used for aerospace masking, paint stripping protection, heat shielding, HVAC duct sealing, vapor barrier applications, and industrial metal patching where long-term durability is required.
Is Polyken 345 considered “speed tape”?
Yes. In aviation and maintenance environments, Polyken 345 is frequently referred to as “speed tape” due to its conformability, strength, and resistance to heat and chemicals during temporary repairs and masking operations.
Does Polyken 345 remove cleanly?
When applied to properly prepared surfaces, Polyken 345 removes cleanly from most substrates, making it ideal for temporary masking and protection without adhesive residue.
What temperature range can Polyken 345 handle?
Polyken 345 performs in temperatures ranging from approximately -40°F to 350°F (-40°C to 177°C), maintaining adhesion and foil integrity in high-heat environments.
How does Polyken 345 compare to 3M 425?
Polyken 345 is widely regarded as a U.S.-made alternative to 3M™ 425 Aluminum Foil Tape, offering comparable thickness, conformability, and performance for aerospace and industrial sealing applications.
- Premium dead-soft aluminum foil tape for industrial and aerospace use
- 5-mil total thickness for durability and puncture resistance
- High-performance solvent-resistant adhesive
- Self-wound construction (no release liner) for faster application
- Excellent conformability to irregular and contoured surfaces
- High heat resistance for demanding environments
- Flame retardant; meets FAR 25.853(a)
- Clean removal on most properly prepared surfaces
- Ideal for sealing, masking, vapor barriers, and heat shielding
| Product Name | Polyken 345 Silver Foil Tape |
| Brand | Polyken |
| Manufacturer SKU | 345 / 345SW |
| Product Type | Aluminum Foil Tape |
| Color | Silver |
| Total Thickness | 5 mil (3 mil foil / 2 mil adhesive) |
| Adhesion to Steel | 68 oz/in |
| Tensile Strength | 26 lb/in |
| Operating Temperature | -40°F to 350°F |
| Certifications | FAR 25.853(a), SAE AMS-T-23397B |
Application Guidance
- Clean surfaces thoroughly to remove oil, dust, and moisture before application.
- Apply with firm pressure using a squeegee or roller for maximum adhesion.
- Ensure final tape edges are fully pressed down to prevent flagging.
- Allow adhesive to dwell before exposure to extreme heat or chemicals.
Storage & Handling
- Store in a cool, dry place away from direct sunlight.
- Do not stretch during application to avoid edge lifting.
- Industrial and professional use recommended.
- Best for: Aerospace masking, HVAC duct sealing, vapor barriers, heat shielding, and industrial maintenance
- Why choose Polyken 345: Dead-soft foil + high-performance adhesive + aerospace flame certification
- Quick spec: 5 mil silver foil tape, -40°F to 350°F, self-wound option, FAR 25.853(a) compliant
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