Premium dark gray VHB foam tape with high temperature resistance, perfect for industrial bonding and assembly applications. Replaces rivets, welds, and screws with permanent, durable adhesion.
3M™ VHB™ Tape 4646 is a premium dark gray, 0.025 inch (0.6 mm) thick general purpose adhesive tape with firm foam backing and exceptional high temperature resistance capabilities. This innovative bonding solution combines the strength of permanent adhesion with the flexibility of foam construction, making it an ideal replacement for traditional mechanical fasteners such as rivets, welds, and screws. The tape features acrylic-based pressure-sensitive adhesive that bonds on contact, providing immediate handling strength while maintaining long-term durability.
Designed specifically for industrial applications, the 4646 tape excels in high-temperature paint processing environments and is typically used on metal substrates including aluminum, galvanized steel, and stainless steel. The tape operates reliably at temperatures up to 300°F (149°C), making it suitable for assembly operations before paint ovens and other demanding thermal applications. With its viscoelastic properties, the tape offers exceptional design flexibility and can bond to a variety of surfaces while creating a permanent seal against water, moisture, and environmental contaminants.
This 12-roll case contains rolls measuring 3/4 inch (19.05 mm) wide by 36 yards (32.91 m) long, wound on a 3-inch core with polyethylene film liner. The VHB 4646 represents over 40 years of 3M innovation in adhesive tape technology, proven in applications ranging from skyscrapers and automotive assembly to consumer electronics and architectural installations. It eliminates the need for drilling, grinding, refinishing, and associated cleanup while allowing manufacturers to use thinner, lighter-weight, and dissimilar materials in their designs.
Key Features
- High temperature resistance up to 300°F (149°C) for paint oven processing
- Permanent pressure-sensitive bonding with immediate handling strength
- Replaces mechanical fasteners, rivets, welds, and liquid adhesives
- Creates waterproof seal resistant to moisture and environmental contaminants
- Enables use of thinner, lighter, and dissimilar materials in design
- Virtually invisible fastening maintains smooth surface appearance
- Dark gray firm foam construction with acrylic adhesive
- Suitable for metal substrates including aluminum, steel, and stainless steel
Technical Specifications
| Specification |
Value |
| Product Name | 3M VHB Tape 4646 |
| Part Number | 4646 |
| 3M Product ID | 7010536077 |
| Color | Dark Gray |
| Overall Width (Imperial) | 0.75 in |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Tape Thickness without Liner (Imperial) | 23.622 mil |
| Tape Thickness with Liner | 0.025 in (0.6 mm) |
| Core Size | 3 in |
| Foam Type | Firm |
| Adhesive Type | Acrylic |
| Liner Material | Polyethylene Film |
| Maximum Operating Temperature (Fahrenheit) | 300 ℉ |
| Maximum Operating Temperature (Celsius) | 149 ℃ |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| Smallest Saleable Unit | Roll |
| Package Configuration | 12 Roll/Case |
| Brand | VHB™ |
| Industries | General Industrial, Metalworking |
| Pressure-Sensitive | Yes - bonds on contact |
| Moisture Resistance | Excellent - creates permanent seal against water and moisture |
| Chemical Resistance | Highly resistant to solvents and environmental contaminants |
| UV Stability | Temperature and UV stable |
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