3M™ VHB™ Tape 4947

3M™ VHB™ 4947 Tape: high-performance double-sided adhesive

The 3M™ VHB™ 4947 tape bonds where mechanical fasteners fail. No drilling, no screws: a permanent, invisible, and resilient bond.

Its double-sided acrylic foam absorbs vibrations and compensates for thermal expansion. It holds on metal, glass, plastic, and composites.

Designed for demanding industrial applications, it supports heavy loads and resists weathering, UV rays, and solvents over the long term.

What is 3M™ VHB™ 4947 Tape?

3M™ VHB™ 4947 Tape is a double-sided adhesive with an acrylic foam core, designed to replace traditional mechanical fasteners. It bonds two surfaces permanently without screws, rivets, or welds.

Its core is a 1.1 mm thick gray acrylic foam. It absorbs vibrations, compensates for surface irregularities, and distributes stress across the entire contact surface.

It is particularly well-suited for low surface energy materials such as powder coatings, plastics, and lacquered metals, materials that are difficult to bond with conventional adhesives.

VHB Technology: structural bonding without screwing or riveting

VHB stands for Very High Bond. It is not just an adhesive tape: it is a structural bonding system used in the automotive, construction, electronics, and signage industries.

Unlike liquid adhesive or sealant, VHB 4947 offers immediate shear and peel resistance, while remaining flexible under thermal stress. It withstands temperatures ranging from -40°C to +90°C continuously.

Here is what sets the VHB 4947 apart from its close cousins in the 3M range:

Product	Core	Thickness	Color	Primary Use
3M™ VHB™ 4947	Acrylic foam	1.1 mm	Gray	Painted surfaces, metals, rigid plastics
3M™ VHB™ 4905	No core (film)	0.5 mm	Transparent	Smooth surfaces, glazing, signs
3M™ VHB™ 4941	Acrylic foam	1.1 mm	Gray	Rough surfaces, composite materials
3M™ VHB™ 5952	Black acrylic foam	1.1 mm	Black	Low surface energy plastics (PP, PE)

Technical properties and typical characteristics of 3M™ VHB™ 4947

3M™ VHB™ 4947 is a viscoelastic acrylic foam double-sided tape. Its gray foam core gives it a thickness of 1.6 mm, allowing it to absorb vibrations and compensate for surface irregularities.

It develops adhesion on both sides thanks to a high-performance acrylic. The bond strength increases over time: the final peel strength is reached after 72 hours at room temperature.

Its main measured characteristics:

• Total thickness: 1.6 mm
• 90° Peel strength: approximately 33 N/cm on stainless steel
• Static shear resistance: greater than 10,000 minutes on steel
• Service temperature range:, 40°C to +90°C (peaks at +150°C)
• Foam color: gray
• Liner: red

The 4947 is designed for low surface energy materials like powder coatings, plastics, and lacquered metals. It excels where other VHB tapes struggle to adhere.

Reference	Thickness	Foam color	Primary Use
3M™ VHB™ 4947	1.6 mm	Gray	Low surface energy materials, lacquered metals, plastics
3M™ VHB™ 4945	1.1 mm	Gray	Smooth surfaces, thin assemblies
3M™ VHB™ 4941	1.1 mm	Gray	Rough surfaces, composite panels
3M™ VHB™ 5952	1.1 mm	Black	Very irregular surfaces, automotive applications

Application areas and compatible surfaces

The 3M™ VHB™ 4947 tape is designed to assemble, attach, and seal materials without screws or rivets. Its dense gray acrylic foam provides permanent adhesion on a wide range of surfaces.

It adheres effectively to painted or unpainted metals, stainless steel, aluminum, glass, composites, and most rigid plastics (ABS, polycarbonate, acrylic).

Surfaces must be clean, dry, and degreased before application. A 3M™ primer may improve adhesion on low surface energy substrates.

Use in industry, construction, and transport

In industry, this tape replaces screws for attaching signage panels, electrical enclosures, protective plates, or structural reinforcements.

In construction, it assembles composite facades, aluminum cladding, glazing, and joinery elements. It withstands climatic stresses and significant thermal variations.

In the transport sector (automotive, rail, commercial vehicles), it attaches bodywork elements, interior trim, and logos. It absorbs vibrations and reduces noise.

Here are the compatible surfaces by sector:

• Metals: raw steel, lacquered steel, anodized aluminum, stainless steel
• Plastics: ABS, polycarbonate, acrylic, rigid PVC
• Composites: fiberglass, HPL panels, aluminum sandwich panels
• Glass: tempered, laminated, screen-printed

Product	Thickness	Target Substrate	Typical Usage
3M™ VHB™ 4947	1.1 mm	Metals, composites, glass	Industrial assembly, transport, construction
3M™ VHB™ 4910	1.0 mm	Smooth surfaces, glass, acrylic	Signage, glazing, display
3M™ VHB™ 5952	1.1 mm	Rough surfaces, textured paints	Automotive bodywork, facades
Tesa® ACXplus 7076	1.0 mm	Metals, plastics	Electronics, light industry

Comparison: 3M™ VHB™ 4947 vs. other high-strength double-sided tapes

The market for high-strength double-sided tapes offers several options. Here is how the 3M™ VHB™ 4947 positions itself against its main competitors.

Comparison table of main VHB tapes and market equivalents

Product	Manufacturer	Core	Thickness	Tensile strength	Max. Temp.	Primary Application
VHB™ 4947	3M	Gray acrylic foam	1.1 mm	~700 N/100 mm	+149 °C	Metals, painted surfaces, rigid plastics
VHB™ 4950	3M	Gray acrylic foam	1.1 mm	~700 N/100 mm	+149 °C	Smooth surfaces, glass, polished metal
VHB™ 4941	3M	Gray acrylic foam	1.1 mm	~500 N/100 mm	+149 °C	Slightly irregular surfaces
VHB™ 5952	3M	Black acrylic foam	1.1 mm	~900 N/100 mm	+149 °C	Low surface energy plastics (PP, PE)
Tesa® ACXplus 7076	Tesa	Acrylic foam	1.0 mm	~600 N/100 mm	+120 °C	Facades, outdoor signage
Nitto 5015N	Nitto	PE foam	1.0 mm	~400 N/100 mm	+80 °C	Light assembly, interior

The VHB™ 4947 stands out for its dense acrylic foam core, which absorbs mechanical stress and thermal expansion.

Compared to VHB™ 5952, the 4947 is more versatile on painted surfaces and treated metals. The 5952 remains the preferred choice for low surface energy plastics.

Compared to Tesa® ACXplus or Nitto solutions, the VHB™ 4947 offers superior thermal resistance and higher mechanical holding power. It stands out in demanding industrial environments where long-term durability is critical.

Application tips to ensure bonding performance

The 3M™ VHB™ 4947 tape reaches its peak performance only if the surface is correctly prepared. A sloppy bond, even with the best adhesive on the market, will not hold.

Always clean the surfaces before application. Use a lint-free cloth dampened with isopropanol or a recommended 3M cleaner. Let dry completely before applying the tape.

The surface must be dry, free of grease, dust, and oil. Any residual contamination drastically reduces the final bond strength.

Apply firm and uniform pressure along the entire length of the bond. Use a 5 to 7 kg roller or press manually with steady force. It is this pressure that activates the intimate contact between the acrylic adhesive and the substrate.

Respect the build-up time. Final strength is reached after 72 hours at room temperature. Avoid subjecting the assembly to mechanical stress during this period.

Some essential points to remember:

• Ideal application temperature: between 15°C and 38°C
• Avoid any application on wet or frozen surfaces
• On low surface energy materials (PE, PP), use a 3M™ AP115 primer to improve adhesion
• Do not stretch the tape during application: this reduces thickness and stress-absorption capacity

A well-executed assembly with VHB™ 4947 can durably replace screws or rivets in many industrial applications.

FAQ - 3M™ VHB™ 4947 Tape

1. What is the difference between 3M™ VHB™ 4947 and other VHB references?

The 4947 is a gray VHB tape with a 1.1 mm thick acrylic foam core. It offers excellent resistance to UV, weathering, and solvents. Other references like 4941 (0.4 mm) or 4950 (1.1 mm white) exist, but the 4947 is the versatile reference favored for demanding outdoor assemblies.

2. On which materials does 3M™ VHB™ 4947 adhere correctly?

It bonds effectively to smooth and rigid surfaces: stainless steel, aluminum, glass, polycarbonate, ABS, and many painted plastics.

On porous or low surface energy surfaces (polyethylene, polypropylene), adhesion is limited. A 3M™ adhesion primer can improve results in these cases.

3. Can the 4947 replace rivets or screws?

Yes, that is precisely one of its key strengths. The VHB™ 4947 distributes stress across the entire bonded area, unlike a mechanical fastener point which concentrates force.

It is used to replace screws in signage, architectural facades, electronics, and the automotive industry. However, build-up times must be respected (72 hours to reach full strength).

4. What temperature range does the 3M™ VHB™ 4947 tape withstand?

It resists temperatures from -40°C to +149°C in continuous use. Brief peaks at higher temperatures are tolerated depending on the application.

For environments subject to significant thermal variations, the 4947 is a solid choice thanks to the flexibility of its acrylic foam which absorbs differential expansion.

5. How do I properly prepare the surface before application?

Preparation is decisive. You must degrease thoroughly with a suitable solvent (isopropanol, for example), then let it dry completely.

Then apply the tape while exerting firm and uniform pressure (minimum 15 N/cm²). Application should be done at a temperature above 10°C to ensure good adhesive wetting.

6. Is the 3M™ VHB™ 4947 suitable for outdoor use?

Yes. The 4947 is formulated to resist UV rays, humidity, and climatic variations. It is commonly used on facades, on outdoor panels, and in the transport sector.

Its long-term outdoor durability is one of the reasons it is preferred over a standard double-sided adhesive for permanent applications.