Benefits
Reliable Structural Bonding
Replaces rivets, screws, welds, and liquid adhesives while creating a smooth, clean appearance.
Excellent Conformability
The viscoelastic acrylic foam adapts to uneven surfaces and accommodates thermal expansion between dissimilar materials.
Wide Material Compatibility
Provides strong adhesion to aluminum, stainless steel, galvanized steel, glass, acrylic, polycarbonate, ABS, painted metals, sealed wood, and concrete.
Outstanding Environmental Durability
Maintains long-term performance under UV exposure, humidity, moisture, and outdoor weather conditions.
Waterproof Sealing
The closed-cell acrylic foam forms a durable seal against water, dust, and environmental contaminants.
Improved Manufacturing Efficiency
Pressure-sensitive bonding eliminates drilling, welding, grinding, and curing, reducing production time and labor costs.
Technical Specifications
| Property | Specification |
|---|---|
| Product Name | 3M™ VHB™ 4941 |
| Tape Type | Double-Sided Acrylic Foam Tape |
| Foam Color | Gray |
| Adhesive Type | Multi-Purpose Acrylic |
| Foam Type | Conformable Closed-Cell Acrylic Foam |
| Thickness | 1.1 mm (45 mil) |
| Liner | Densified Kraft Paper (PCK) |
| Long-Term Temperature Resistance | 93°C (200°F) |
| Maximum Operating Temperature | 149°C (300°F) |
| Indoor / Outdoor | Yes |
| UV Resistance | Excellent |
| Moisture Resistance | Excellent |
| Shelf Life | 24 Months |
| Converting Services | Slitting, Rewinding, Laminating, Die-Cutting, Kiss-Cutting |
Applications
Typical applications include:
- Panel-to-frame bonding
- Stiffener attachment
- Metal panel installation
- Decorative trim mounting
- Nameplates and logos
- Electronic displays
- Appliance manufacturing
- Signage and display systems
- Commercial vehicle assembly
- Truck and trailer body panels
- Rail car interior construction
- HVAC equipment
- Construction panels
- General industrial structural bonding
Compatible Materials
| Excellent Compatibility | Good Compatibility | Testing Recommended |
|---|---|---|
| Aluminum | Painted Metals | Polypropylene (PP) |
| Stainless Steel | ABS | Polyethylene (PE) |
| Galvanized Steel | Acrylic (PMMA) | PTFE |
| Glass | Polycarbonate (PC) | Silicone Rubber |
| Composite Materials | Sealed Wood & Concrete | Untreated LSE Plastics |
Note: 3M™ VHB™ 4941 is optimized for bonding high and medium surface energy materials. Adhesion testing is recommended before production for low surface energy plastics.
Industries
- Transportation
- Automotive
- Construction
- Appliance Manufacturing
- Electronics
- Signage & Displays
- Metal Fabrication
- Renewable Energy
- HVAC
- General Industrial Manufacturing
Why Choose 3M™ VHB™ 4941?
3M™ VHB™ 4941 is one of the most versatile structural bonding tapes in the VHB portfolio. Its 1.1 mm conformable acrylic foam core provides an excellent balance of strength, flexibility, sealing performance, and durability. The multi-purpose acrylic adhesive delivers reliable bonding across a broad range of materials while simplifying assembly and improving product appearance.
Key advantages include:
- 1.1 mm conformable acrylic foam
- Multi-purpose acrylic adhesive
- Excellent HSE and MSE substrate adhesion
- Permanent structural bonding
- Waterproof sealing
- Outstanding UV and weather resistance
- Excellent vibration damping
- Precision die-cutting compatibility
- No curing required
- OEM converting services available
Installation Guide
- Clean all bonding surfaces with isopropyl alcohol (IPA).
- Ensure surfaces are clean, dry, and free from grease or dust.
- Apply the tape using firm, uniform pressure.
- Avoid repositioning after initial contact.
- Approximately 50% bond strength develops after 20 minutes, 90% after 24 hours, and 100% after 72 hours at room temperature.
- Validate performance before mass production.
Storage
Store the tape in its original packaging.
Recommended storage conditions:
- Temperature: 16°C–27°C (60°F–80°F)
- Relative Humidity: 40%–60%
- Store in a cool, dry place.
- Avoid direct sunlight and excessive heat.
- Store rolls horizontally whenever possible.
- Follow FIFO (First-In, First-Out) inventory management.
- Shelf life: 24 months.
Frequently Asked Questions (FAQ)
What is 3M™ VHB™ 4941 used for?
It is widely used for panel bonding, stiffener attachment, decorative trim, signage, electronic displays, transportation equipment, appliances, and general structural bonding.
How thick is 3M™ VHB™ 4941?
The nominal thickness is 1.1 mm (45 mil).
What materials can 4941 bond?
It bonds aluminum, stainless steel, galvanized steel, glass, acrylic, polycarbonate, ABS, painted metals, sealed wood, composites, and concrete.
Can 4941 replace rivets and screws?
Yes. It is engineered to replace mechanical fasteners while reducing weight, improving appearance, and simplifying manufacturing.
Is 4941 suitable for outdoor use?
Yes. It offers excellent resistance to UV radiation, moisture, weathering, and temperature cycling.
What is the difference between 4941 and 5952?
- 4941 uses a gray conformable acrylic foam with a multi-purpose acrylic adhesive, making it ideal for bonding high- and medium-surface-energy materials such as metals, glass, and ABS.
- 5952 uses a black very conformable acrylic foam with a modified acrylic adhesive, offering better adhesion to painted surfaces, powder-coated finishes, and many low-surface-energy plastics.
Can 4941 be die-cut?
Yes. The PCK liner provides excellent dimensional stability for precision die-cutting, kiss-cutting, and automated converting. Guangdong Yousan also provides custom die-cutting and OEM converting services.
Downloads
Available upon request:
- 3M™ VHB™ 4941 Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- Product Brochure
- Application Guide
- Die-Cutting Capability Guide
Please contact our sales team if you require the latest technical documentation.
