High-performance double-sided acrylic foam tape replacing rivets, welds, and screws with superior bonding strength for industrial applications up to 250°F.
3M™ VHB™ Tape 4991B is a high-performance double-sided acrylic foam tape with polyethylene film liner designed for industrial bonding applications. This premium adhesive solution excels on high and medium surface energy substrates including aluminum, stainless steel, galvanized steel, composites, plastics, acrylic, polycarbonate, ABS, and painted or sealed wood and concrete. The tape features a conformable acrylic foam core that provides an excellent balance of strength and flexibility, making it suitable for replacing traditional fasteners, rivets, welds, and liquid adhesives while significantly reducing labor costs and assembly time.
Engineered with closed-cell acrylic chemistry, 3M VHB Tape 4991B delivers exceptional chemical resistance and UV stability for both indoor and outdoor applications. The tape operates reliably at temperatures up to 250°F (121°C) for short-term use and withstands up to 200°F (93°C) for long-term applications. Its viscoelastic properties allow differential expansion and contraction of bonded surfaces, making it ideal for challenging industrial environments. The black color variant offers aesthetic appeal while maintaining superior bonding performance across signage, electronics, construction, appliance, and general industrial applications.
This precision-slit tape comes in a convenient 12-roll case format with dimensions of 0.734 inches (18.64 mm) width and 36 yards (32.91 m) length per roll. UL GREENGUARD and UL GREENGUARD Gold Certified, the tape contributes to LEED credits and environmental sustainability goals. With a 24-month shelf life and proven reliability in mounting, fastening, sealing, and assembly operations, 3M VHB Tape 4991B is the go-to solution for decorative trim attachment, nameplate bonding, logo placement, electronic display mounting, and panel-to-frame assembly across multiple industries.
Key Features
- Fast and easy to use with strong, long-lasting results on thin and dissimilar materials
- Replaces rivets, welds, screws, and liquid adhesives for cost-effective assembly
- Provides clean and seamless joining with concealed bonding on thin substrates
- Operates reliably from -40°F to 250°F (-40°C to 121°C) for short-term use
- UL GREENGUARD and UL GREENGUARD Gold Certified for LEED credit contribution
- Conformable acrylic foam core balances strength with flexibility and vibration resistance
- Excellent chemical resistance and UV stability for indoor and outdoor applications
- Closed-cell acrylic chemistry withstands extreme environments and moisture
- Suitable for aluminum, steel, composites, plastics, acrylic, and wood substrates
- Ideal for signage, electronics, construction, appliance, and transportation industries
Technical Specifications
| Specification |
Value |
| Product Name | 3M VHB Tape 4991B |
| Part Number | 4991B |
| 3M Product Number | 4991B |
| UPC Code | 00638060401156 |
| Product Color | Black |
| Overall Width (Imperial) | 0.734 in |
| Overall Width (Metric) | 18.64 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Total Tape Thickness without Liner (Imperial) | 90 mil |
| Total Tape Thickness without Liner (Metric) | 2.3 mm |
| Core Size (Imperial) | 3 in |
| Core Size (Metric) | 76.2 mm |
| Liner Material | Polyethylene Film |
| Adhesive Type | Acrylic |
| Foam Type | Conformable |
| Maximum Operating Temperature (Fahrenheit) | 250 °F (Short-term), 200 °F (Long-term) |
| Maximum Operating Temperature (Celsius) | 121 °C (Short-term), 93 °C (Long-term) |
| Minimum Operating Temperature | -40 °F (-40 °C) |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Packaging | 12 Roll/Case |
| Precision Slit | Yes |
| Brand | VHB™ |
| Certifications | UL GREENGUARD, UL GREENGUARD Gold |
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