Professional-grade double-sided foam tape with acrylic adhesive for permanent industrial bonding, offering immediate handling strength and superior durability across diverse substrates and extreme environments.
3M™ VHB™ Tape 4991 is a professional-grade double-sided foam tape engineered for permanent bonding applications across industrial sectors. This innovative tape features a multi-purpose acrylic adhesive combined with a conformable acrylic 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 both high and medium surface energy materials, making it an ideal seamless alternative to traditional mechanical fasteners such as rivets, welds, and screws, as well as liquid adhesives.
The 3M™ VHB™ Tape 4991 excels in delivering exceptional shear strength, outstanding conformability, and superior surface adhesion across diverse substrates including aluminum, stainless steel, galvanized steel, composites, plastics, acrylic, polycarbonate, ABS, and painted or sealed wood and concrete. With its viscoelastic properties, this tape provides immediate handling strength without requiring fixtures or extended cure times, enabling faster assembly processes and enhanced manufacturing efficiency. The tape offers remarkable outdoor durability and performance, resisting both extreme high and low temperatures as well as moisture exposure, making it suitable for applications in harsh environmental conditions.
Commonly utilized across transportation, appliance, electronics, construction, signage, and general industrial markets, the 3M™ VHB™ Tape 4991 enables designers to utilize thinner, lighter-weight, and dissimilar materials compared to traditional fastening methods. The tape is UL GREENGUARD™ and UL GREENGUARD™ Gold Certified, contributing to LEED® credits for sustainable building projects. With its proven reliability, consistent bond quality, and excellent solvent and moisture resistance, this specialty bonding tape has become the trusted choice for applications ranging from decorative trim and nameplates to electronic displays, panel-to-frame bonding, and stiffener attachment in modern manufacturing.
Key Features
- Fast and Easy-to-Use: Permanent bonding method providing immediate handling strength without fixtures or cure time
- Smooth and Seamless: 90 mil thickness designed as alternative to rivets, welds, screws, and liquid adhesives
- Built to Perform: Excellent shear strength, conformability, and surface adhesion with acrylic foam core
- Durable and Weather-Resistant: Excellent outdoor durability resisting high/low temperatures and moisture
- Multi-Surface Versatility: Adheres to HSE and MSE substrates including metals, plastics, composites, and coated materials
- Certified Green Product: UL GREENGUARD™ and UL GREENGUARD™ Gold Certified for LEED® credits
- Enables Lightweight Design: Allows use of thinner, lighter-weight, and dissimilar materials compared to mechanical fasteners
- Closed-Cell Chemistry: Proven to withstand extreme environments with excellent bonding and sealing performance
Technical Specifications
| Specification |
Value |
| Product Number | 3M Product Number 4991 |
| Part Number | 4991B |
| 3M ID | 7010536008 |
| Overall Width (Imperial) | 0.75 in |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Core Size (Imperial) | 3 in |
| Thickness | 90 mil (2.3 mm) |
| Product Color | Gray |
| Liner Material | Polyethylene Film (5 mil red printed) |
| Adhesive Type | Multi-purpose Acrylic |
| Foam Type | Conformable Acrylic |
| Maximum Operating Temperature (Fahrenheit) | 250 ℉ |
| Maximum Operating Temperature (Celsius) | 121 ℃ |
| Indoor/Outdoor | Indoor/Outdoor |
| Application | Exterior Metal Skin Bonding |
| Smallest Saleable Unit | Roll |
| Brand | VHB™ |
| Industries | Appliance, Construction, Electronics, General Industrial, Metalworking, Signage, Transportation |
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