Industrial-grade double-sided foam tape with permanent bonding strength, 90 mil thickness, conformable acrylic adhesive, suitable for metal, plastic, and composite substrates, 1/4 in x 36 yd per roll.
3M™ VHB™ Tape 4991 is a premium double-sided foam tape engineered for industrial bonding and sealing applications. This versatile adhesive tape features a multi-purpose acrylic adhesive with a conformable foam core, backed by a 5 mil red printed polyethylene film liner, delivering a total thickness of 90 mil (2.3 mm) when applied. The tape provides an excellent balance of strength, conformability, and adhesion to high and medium surface energy materials, making it an ideal alternative to traditional mechanical fasteners such as rivets, welds, and screws, as well as liquid adhesives. With immediate handling strength and no need for fixtures or cure time, this tape enables faster assembly processes while maintaining superior bond quality.
3M™ VHB™ Tape 4991 is designed for applications requiring permanent bonding across diverse industries including transportation, appliances, electronics, construction, signage, and general industrial manufacturing. The tape's acrylic chemistry provides exceptional durability and environmental resistance, withstanding extreme temperatures ranging from -40°C to 121°C (-40°F to 250°F), high humidity, moisture, and UV exposure. Its closed-cell acrylic foam structure ensures reliable performance in both indoor and outdoor environments, making it suitable for applications from decorative trim and nameplates to panel-to-frame bonding and stiffener attachment. The 1/4 inch width and 36-yard length per roll (36 rolls per case) make this product ideal for high-volume industrial operations.
This conformable foam tape delivers excellent shear strength and surface adhesion to a broad range of substrates including aluminum, stainless steel, galvanized steel, composites, plastics, acrylic, polycarbonate, ABS, and painted or sealed wood and concrete. The tape is UL GREENGUARD™ and UL GREENGUARD™ Gold Certified, contributing to LEED® credit eligibility for sustainable building projects. 3M™ VHB™ Tape 4991 represents the evolution of the VHB™ tape family, first invented by 3M in 1980 as the original foam bonding tape, and continues to be the trusted solution for engineers and manufacturers worldwide seeking reliable, efficient, and aesthetically superior bonding solutions.
Key Features
- Fast and easy-to-use permanent bonding method with immediate handling strength and no fixture or cure time required
- 90 mil thickness with acrylic foam core and multi-purpose adhesive for excellent shear strength and conformability
- Multi-surface compatibility adhering to high and medium surface energy materials including metals, plastics, glass, and composites
- Extreme environmental durability resisting high and low temperatures, moisture, UV exposure, and outdoor weathering
- UL GREENGUARD™ and UL GREENGUARD™ Gold Certified for sustainable construction and LEED® credit contribution
- Smooth seamless alternative to mechanical fasteners, rivets, welds, and screws with superior aesthetics
- Versatile applications across transportation, appliances, electronics, construction, signage, and industrial markets
- Proven reliability with closed-cell acrylic chemistry providing long-lasting, solvent-resistant bonds
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ VHB™ Tape 4991 |
| Part Number | 4991 |
| 3M ID | 7010535711 |
| Overall Width (Imperial) | 0.25 in (1/4 inch) |
| Overall Width (Metric) | 6.35 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Total Thickness | 90 mil (2.3 mm) |
| Core Size (Imperial) | 3 in |
| Product Color | Gray |
| Adhesive Type | Multi-purpose Acrylic |
| Foam Type | Conformable |
| Liner Material | Polyethylene Film (5 mil red printed) |
| Maximum Operating Temperature (Fahrenheit) | 250°F |
| Maximum Operating Temperature (Celsius) | 121°C |
| Minimum Operating Temperature | -40°F (-40°C) |
| Indoor/Outdoor | Indoor/Outdoor |
| Application Type | Exterior Metal Skin Bonding |
| Brand | VHB™ |
| Smallest Saleable Unit | Roll |
| Package Configuration | 36 Roll/Case |
| Surface Energy Compatibility | High Surface Energy (HSE) and Medium Surface Energy (MSE) |
| Compatible Substrates | Aluminum, stainless steel, galvanized steel, acrylic, polycarbonate, ABS, composites, plastics, painted wood, sealed concrete, glass |
| Certifications | UL GREENGUARD™ Gold Certified, LEED® Credit Eligible |
| Industries | Transportation, Appliance, Construction, Electronics, General Industrial, Metalworking, Signage |
| Use Classification | Industrial/Occupational Use Only |
| Chemical Resistance | Solvent resistant, moisture resistant, UV resistant |
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