Premium weather-resistant film tape with Tedlar® PVF backing for outdoor sealing and protection applications. Features acrylic adhesive, temperature range -100°F to 225°F, and excellent chemical resistance.
3M™ Weather Resistant Film Tape 838 is a premium industrial-grade adhesive tape engineered for long-term outdoor exposure applications. This white, 3.4 mil thick tape features a Tedlar® PVF Film backing that provides exceptional strength without adding bulk, combined with a high-shear acrylic adhesive formulation. The tape is specifically designed for critical sealing and protection applications in building and construction, aerospace, signage, military, and window and door industries.
The tape delivers outstanding performance characteristics including excellent weathering resistance, superior mechanical properties, and exceptional inertness toward a wide variety of chemicals, solvents, and staining agents. With no plasticizers in the formulation, this tape maintains excellent long-term aging properties and remains tough and flexible across a broad temperature range from -100°F/-73°C to 225°F/107°C. The acrylic adhesive provides immediate bonding on contact and maintains secure adhesion for extended periods while resisting temperature and climate variations.
Ideal applications include sealing seams of outdoor building panels, windows and doors, hinge seals on shower doors, moisture intrusion prevention in critical areas, and general sealing, wrapping, and protection in outdoor exposure environments. The tape meets ASTM D3330, ASTM D3652, and ASTM D3759 specifications, ensuring compliance with industry standards. Each roll measures 3 inches wide by 288 yards long, providing ample coverage for large-scale industrial projects.
Key Features
- Tedlar® PVF Film backing provides strength without added thickness
- Excellent resistance to weathering for outdoor exposure applications
- Outstanding mechanical properties and chemical inertness
- No plasticizers for superior long-term aging properties
- Operates reliably across broad temperature range -100°F to 225°F
- Acrylic adhesive with immediate bonding and high shear strength
- Solvent resistant to jet fuel, hydraulic fluid, and lubricating oils
- Maintains adhesion through climate and temperature variations
- Meets ASTM D3330, D3652, and D3759 specifications
- Ideal for aerospace, military, and construction applications
Technical Specifications
| Specification |
Value |
| Product Type | Adhesive Tape |
| Backing Material | Tedlar PVF Film |
| Adhesive Type | Acrylic |
| Width | 3 inches (76.2 mm) |
| Length | 288 yards (263.347 meters) |
| Overall Thickness | 3.4 mil (0.09 mm) |
| Backing Thickness | 2.1 mil (0.05 mm) |
| Color | White |
| Adhesion Strength | 47 oz/in (51 N/100mm) |
| Tensile Strength | 24 lb/in (42 N/100mm) |
| Elongation at Break | 170% |
| Minimum Operating Temperature | -100°F (-73°C) |
| Maximum Operating Temperature | 225°F (107°C) |
| Shelf Life | 18 months from date of manufacture |
| Product Form | Roll |
| Adhesive Sides | Single-sided |
| Liner Color | White |
| Specifications Met | ASTM D3330, ASTM D3652, ASTM D3759 |
| Part Number | 838 |
| UPC | 00068060001177 |
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