Benefits
Permanent Structural Bonding
Replaces mechanical fasteners and liquid adhesives while creating clean, seamless bond lines.
Excellent Conformability
The soft acrylic foam compensates for slight surface irregularities and manufacturing tolerances.
Broad Material Compatibility
Provides excellent adhesion to aluminum, stainless steel, galvanized steel, glass, acrylic, polycarbonate, ABS, painted metals, and many composite materials.
Outstanding Environmental Durability
Maintains excellent performance under UV exposure, moisture, humidity, and outdoor weather conditions.
Waterproof Sealing
The closed-cell acrylic foam creates a durable seal against water, dust, and environmental contaminants.
Faster Manufacturing
Pressure-sensitive adhesive provides immediate handling strength without curing, reducing production time.
Technical Specifications
| Property | Specification |
|---|---|
| Product Name | 3M™ VHB™ 4956 |
| Tape Type | Double-Sided Acrylic Foam Tape |
| Foam Color | Gray |
| Adhesive Type | Multi-Purpose Acrylic |
| Foam Type | Conformable Closed-Cell Acrylic Foam |
| Thickness | 1.6 mm (62 mil) |
| Density | 720 kg/m³ |
| Liner | White Densified Kraft Paper (DK) |
| Liner Thickness | 0.08 mm (3 mil) |
| Short-Term Temperature Resistance | 149°C (300°F) |
| Indoor / Outdoor | Yes |
| UV Resistance | Excellent |
| Moisture Resistance | Excellent |
| Certifications | UL GREENGUARD®, UL GREENGUARD Gold |
| Converting Services | Slitting, Rewinding, Laminating, Die-Cutting, Kiss-Cutting |
Applications
Typical applications include:
- Panel-to-frame bonding
- Metal stiffener attachment
- Decorative trim installation
- Nameplate and logo mounting
- Electronic display assembly
- Appliance manufacturing
- Transportation equipment assembly
- Architectural panel bonding
- Glass-to-metal bonding
- Plastic housing assembly
- Signage and display fabrication
- Window and door assembly
- Industrial equipment manufacturing
- General 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 | Low Surface Energy Plastics |
Note: 3M™ VHB™ 4956 is optimized for high surface energy (HSE) and medium surface energy (MSE) substrates. Adhesion testing is recommended before bonding low surface energy plastics.
Industries
- Automotive
- Transportation
- Electronics
- Appliance Manufacturing
- Construction
- Metal Fabrication
- Signage & Displays
- HVAC
- Renewable Energy
- General Industrial Manufacturing
Why Choose 3M™ VHB™ 4956?
3M™ VHB™ 4956 is one of the most versatile tapes in the 4941 Family. Its 1.6 mm conformable acrylic foam provides an excellent balance between strength and flexibility, making it ideal for structural bonding and sealing applications where slight surface irregularities must be accommodated.
Key advantages include:
- 1.6 mm conformable acrylic foam
- Multi-purpose acrylic adhesive
- Excellent peel and shear strength
- Strong adhesion to metals and engineering plastics
- Waterproof sealing
- UV and weather resistance
- Excellent vibration damping
- Immediate handling strength
- UL GREENGUARD® Certified
- Precision die-cutting and OEM converting services available
Installation Guide
- Clean bonding surfaces with isopropyl alcohol.
- Ensure surfaces are dry and free of dust, grease, or oil.
- Apply the tape using firm, even 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 adhesion through production testing 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%
- Avoid direct sunlight.
- Store in a cool, dry environment.
- Store rolls horizontally whenever possible.
- Follow FIFO (First-In, First-Out) inventory management.
Frequently Asked Questions (FAQ)
What is 3M™ VHB™ 4956 used for?
It is designed for permanent structural bonding in transportation, electronics, appliances, construction, signage, and general industrial manufacturing.
How thick is 3M™ VHB™ 4956?
The tape has a nominal thickness of 1.6 mm (62 mil).
What materials can it bond?
It bonds aluminum, stainless steel, galvanized steel, glass, acrylic, polycarbonate, ABS, composites, painted metals, and many medium- and high-surface-energy materials.
Can 4956 replace rivets and screws?
Yes. It is specifically designed to replace many mechanical fasteners and liquid adhesives while improving appearance and simplifying assembly.
Is it suitable for outdoor use?
Yes. The tape offers excellent resistance to UV radiation, moisture, weathering, and temperature extremes.
What is the difference between 4956 and 4950?
Both belong to the 4941 Family and have the same 1.6 mm thickness. 4956 uses a conformable acrylic foam core, allowing better bonding on slightly uneven surfaces, while 4950 uses a firm acrylic foam core for higher rigidity and dimensional stability.
Can it be die-cut?
Yes. Guangdong Yousan provides precision slitting, laminating, die-cutting, rewinding, kiss-cutting, and OEM converting services.
Is 4956 certified?
Yes. 3M™ VHB™ 4956 is UL GREENGUARD® and UL GREENGUARD Gold certified, supporting low-emission indoor applications.
Downloads
Available upon request:
- 3M™ VHB™ 4956 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.
