Professional-grade double-sided foam bonding tape with 90 mil thickness, multi-purpose acrylic adhesive, and immediate handling strength. Ideal for metal panels, electronics, and industrial assembly applications.
3M™ VHB™ Tape 4991 is a premium double-sided bonding tape comprised of a multi-purpose acrylic adhesive with a conformable, foam core backed on a 5 mil red printed polyethylene film liner. This professional-grade tape delivers a total thickness of 90 mil (2.3 mm) when applied, providing an excellent balance of strength, conformability, and adhesion to high and medium surface energy materials. The tape serves as a smooth, seamless alternative to mechanical fasteners such as rivets, welds, and screws, or liquid adhesives, making it ideal for permanent bonding and sealing applications across diverse industries.
The 3M™ VHB™ Tape 4991 features an acrylic foam core with multi-purpose adhesive that delivers exceptional shear strength, conformability, and surface adhesion. Its closed-cell acrylic chemistry is engineered to withstand extreme environments, offering excellent outdoor durability and performance while resisting both high and low temperatures as well as moisture. The tape provides immediate handling strength with no need to fixture or wait for a cure, making it a fast and easy-to-use bonding solution for industrial applications. Its versatility allows it to adhere to a broad range of substrates including aluminum, stainless steel, galvanized steel, composites, plastics, acrylic, polycarbonate, ABS, and painted or sealed wood and concrete.
Commonly used in applications across transportation, appliance, electronics, construction, sign and display, and general industrial markets, the 3M™ VHB™ Tape 4991 is UL GREENGUARD™ and UL GREENGUARD™ Gold Certified, helping contribute to LEED® credits. This tape enables the use of thinner, lighter-weight, and dissimilar materials compared to traditional rivets and welds, while enhancing the appearance of finished goods by eliminating visible fasteners. With proven reliability and consistent bonding performance, 3M™ VHB™ Tape 4991 is a trusted solution for demanding industrial bonding and sealing requirements.
Key Features
- Fast and easy-to-use permanent bonding with immediate handling strength requiring no fixture or cure time
- Double-sided foam tape with 90 mil thickness providing smooth, seamless alternative to rivets, welds, and screws
- Excellent shear strength, conformability, and surface adhesion from acrylic foam core and multi-purpose adhesive
- Durable outdoor performance resisting high and low temperatures, moisture, and extreme environmental conditions
- Multi-surface bonding capability for HSE and MSE substrates including metals, plastics, composites, and painted surfaces
- UL GREENGUARD™ and Gold Certified helping contribute to LEED® credits for sustainable construction
- Enables use of thinner, lighter-weight, and dissimilar materials compared to traditional fasteners
- Closed-cell acrylic chemistry proven to withstand extreme environments with excellent solvent and moisture resistance
- Commonly used across transportation, appliance, electronics, construction, and general industrial markets
- Versatile solution for decorative trim, nameplates, electronic displays, panel bonding, and stiffener attachment
Technical Specifications
| Specification |
Value |
| Product Type | Double-Sided Foam Bonding Tape |
| Brand | 3M VHB™ |
| Part Number | 4991 |
| 3M ID | 7010519789 |
| Overall Width (Imperial) | 0.75 in |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Total Thickness | 90 mil (2.3 mm) |
| Adhesive Type | Multi-Purpose Acrylic |
| Core Type | Conformable Acrylic Foam |
| Core Size (Imperial) | 3 in |
| Liner Material | Polyethylene Film (5 mil red printed) |
| Product Color | Gray |
| Foam Type | Conformable |
| Maximum Operating Temperature (Fahrenheit) | 250 °F |
| Maximum Operating Temperature (Celsius) | 121 °C |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| Application | Exterior Metal Skin Bonding |
| Smallest Saleable Unit | Roll |
| Compatible Substrates | Aluminum, Stainless Steel, Galvanized Steel, Composites, Plastics, Acrylic, Polycarbonate, ABS, Painted/Sealed Wood, Concrete |
| Surface Energy Compatibility | High Surface Energy (HSE) and Medium Surface Energy (MSE) |
| Certifications | UL GREENGUARD™, UL GREENGUARD™ Gold Certified |
| Industries | Appliance, Construction, Electronics, General Industrial, Metalworking, Signage, Transportation |
| Key Properties | Excellent shear strength, conformability, surface adhesion, outdoor durability, temperature resistance, moisture resistance, UV stable |
| Recommended Applications | Decorative trim, nameplates, logos, electronic displays, panel to frame bonding, stiffener to panel attachment, polycarbonate lens sealing, window mounting |
| Chemical Resistance | Excellent solvent and moisture resistance |
| Storage and Use | For industrial/occupational use only. Not for consumer sale or use |
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