Name: 3M™ VHB™ Tape 4912F
Brand: 3M Netherlands B.V.
SKU: 3M 4912F

Main features

Product Description

3M™ VHB™ Tape 4912F is a white, double-coated acrylic foam tape designed for permanent bonding applications requiring high strength and long-term durability. It features a general-purpose acrylic adhesive on both sides of a firm acrylic foam core, providing reliable adhesion to many high surface energy substrates including metals, glass, plastics, and painted surfaces.

3M™ VHB™ Tape 4912F features a 2.0 mm thick, closed-cell acrylic foam core with pressure-sensitive adhesive on both sides. The firm foam construction provides strong bonding performance while maintaining conformability between substrates. The tape provides immediate handling strength upon application and can replace mechanical fasteners or liquid adhesives in many assembly applications.

Product Key Features

High-Strength Permanent Bonding – Provides strong, durable attachment with long-term bonding performance.
General-Purpose Acrylic Adhesive – Bonds to many high surface energy substrates including metals, glass, plastics, and painted surfaces.
Firm Acrylic Foam Core – 2.0 mm thick closed-cell foam construction provides reliable bonding and substrate conformability.
Immediate Handling Strength – Pressure-sensitive adhesive bonds on contact for fast and efficient assembly.
Virtually Invisible Fastening – Maintains smooth surface appearance by eliminating visible mechanical fasteners.
Dynamic Stress Absorption – Helps reduce vibration and impact stress within bonded assemblies.
Moisture Sealing Capability – Creates a permanent seal against water, moisture, and environmental exposure.
Replacement for Mechanical Fasteners – Eliminates the need for drilling, grinding, refinishing, screwing, welding, and associated cleanup.
Supports Lightweight Assembly Designs – Allows the use of thinner, lighter-weight, and dissimilar materials.

Applications

3M™ VHB™ Tape 4912F is suited for permanent bonding applications requiring strong adhesion, durability, and clean assembly.

Bonding metal, plastic, and glass components
Attaching panels, trims, and decorative elements
General industrial assembly applications
Applications requiring replacement of rivets, screws, welding, or liquid adhesives
Bonding high surface energy substrates in indoor and outdoor environments

Technical Specifications

No specifications available.

Additional Information

DOUBLE SIDED ACRYLIC FOAM TAPE

3M® VHB®Tape 4912F

3M™ VHB™ Tape 4912F is a clear, double-coated acrylic foam tape designed for permanent bonding applications where a clean appearance and reliable adhesion are required. The acrylic adhesive on both sides provides strong bonding performance to a variety of high surface energy substrates, including metals, glass, and painted surfaces. The transparent acrylic foam core provides a virtually invisible bonding solution while maintaining durable attachment between substrates.

1 mm total thickness UL 94 V-0 149C Short Temperature Resistance High initial tack 93°C Long Term Temperature Resistance

Technical Data Sheet SDS
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Note: Property values shown are typical and not intended for specification. Verify suitability under your geometry, dispense method, and cure profile.

Double Sided Acrylic Foam Tape with Red Polyethylene Film Liner

Key Features

Fast and easy to use
Invisible fastening to keep surfaces smooth
Allows the use of thinner, lighter-weight, and dissimilar materials
Eliminates drilling, grinding, refinishing, screwing, welding and associated re-work
Pressure-sensitive adhesive bonds on contact to provide immediate handling strength

Processing Summary

Clean: Most substrates should be cleaned with a 70/30 mixture of (IPA*)/Water prior to applying 3M™ VHB™ Tape. (See application notes for exceptions)

Apply: Firm application pressure develops better adhesive contact and helps improve bond strength. Typically, good surface contact can be attained by applying enough pressure to ensure that the tape experiences approximately 100 kPa (15 psi) of pressure.

Wait: After application, the bond strength will gradually increase as the adhesive flows onto the surface (also referred to as“wet out”)

Typical Properties

Typical Physical Properties

Property	Typical value	Test method
Color	Clear
Adhesive Type	General Purpose Acrylic
Density	960 kg/m³	ASTM D3574
Adhesive Carrier	Solid Acrylic
Total Tape Thickness	1 mm	ASTM D3652
Thickness Tolerance	±10 %
Liner	Red PE Film 0.13 mm
90 Peel Adhesion	26 N/cm	ASTM D330
Normal Tensile	690 kPa	ASTM D897
Overlap Shear Strength	480 kPa	ASTM D1002, ISO 4587
Static Shear	1000 g @ 23°C , 500 g @ 66°C , 500 g @ 93°C
Minimum Application Temperature	10 °C
Short Term Temp Resistance	149 °C
Long Term Temp Resistance	93 °C

Storage and handling (per technical data sheet)

Shelf life of each component is 24 months when stored at 4°C - 38°C and 0-95% relative humidity. The optimal storage conditions are 22°C (72°F) and 50% relative humidity.

The manufacturing date is available on all 3M™ VHB™ Tapes as the lot number, typically marked on the core or on a label on the outer roll lap. The lot number, typically a 4 digit code, is a Julian date (Y D D D). The first digit refers to the year of manufacture, the last 3 digits refer to the days after January 1.

Example: A lot number of 7266 (or 17266) would translate to a date of manufacture of Sept. 23 (266th day of year) in 2017.

Applications

Surface Preparation and Application Techniques

Proper surface preparation and application technique are critical to achieving the maximum bond strength, durability, and long-term performance of 3M VHB™ Tape 5962F across a wide range of industrial substrates and operating conditions.

Surface Preparation

Clean: Most substrates should be cleaned with a 70/30 mixture of (IPA*)/Water prior to applying 3M™ VHB™ Tape.

Exceptions that may require additional surface preparation include:
• Heavy Oils: A degreaser or solvent-based cleaner may be required to remove heavy oil or grease from a surface and
should be followed by cleaning with IPA/water.
• Abrasion: Abrading a surface, followed by cleaning with IPA/water, can remove heavy dirt or oxidation and can
increase surface area to improve adhesion.
• Adhesion Promoters: Priming a surface can significantly improve initial and ultimate adhesion to many materials such
as plastics and paints.
• Porous surfaces: Most porous and fibered materials such as wood, particleboard, concrete, etc. need to be sealed to
provide a unified surface.
• Unique Materials: Special surface preparation may be needed for glass and glass-like materials, copper and copper
containing metals, and plastics or rubber that contain components that migrate (e.g. plasticizers).

Initial and Final Pressure Application:

Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm application pressure develops better adhesive contact and helps improve bond strength. Typically, good surface contact can be attained by applying enough pressure to ensure that the tape experiences approximately 100 kPa (15 psi) of pressure. Either roller or platen pressure can be used. When bonding two rigid parts, additional final pressure is often required to ensure that the bond line experiences 100 kPa (15 psi).

Tape Application Temperature

The ideal tape application temperature range for 3M™ VHB™ Tapes is generally 21°C to 38°C (70°F to 100°F). Pressure-sensitive adhesives use viscous flow to achieve substrate contact area. The minimum suggested application temperature for most 3M™ VHB™ Tapes is 10°C to 15°C (50°F to 60°F)

*Note: Initial tape application to surfaces at temperatures below these suggested minimums is not suggested because the adhesive becomes too firm to adhere readily. Ideally, all substrates and tape should be conditioned above the minimum application temperature in covered, weatherproof conditions until it is verified the substrates are at or above the minimum temperature. Once properly applied, low-temperature holding is generally satisfactory.

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Product Performance

Bond Build Rate

After application, the bond strength will gradually increase as the adhesive flows onto to the surface (also referred to as “wet out”). The bond build rate will depend on both tape and substrate, but generally, at room temperature, approximately 50% of ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours, and 100% after 72 hours. Adhesive flow is faster at higher temperatures and slower at lower temperatures. Ultimate bond strength can be accelerated (and in some cases bond strength can be increased) by exposure to elevated temperature (e.g. 66°C [150°F] for 1 hour). This can provide better adhesive wet out onto the substrates. Abrasion (~180 grit), or the use of primers/adhesion promoters, can also increase both bond strength as well as the bond build rate.

Technical Guidance

Tips and Troubleshooting

Issue	Recommended Action
Adhesion	Adhesion to the substrate is critical to achieving high bond strength. Adhesives must flow onto the substrate surfaces in order to achieve an intimate contact area and allow the molecular force of attraction to develop. The degree of flow of the adhesive on the substrate is largely determined by the surface energy of the substrate.
Tape Usage	Use the right amount of VHB™ Tape to handle the expected stresses. Because 3M™ VHB™ Tapes are viscoelastic by nature, their strength and stiffness is a function of the rate at which they are stressed. They behave stronger when experiencing a higher rate of stress load (dynamic stresses) and will tend to show creep behavior with stress loads that act over a long period of time (static stresses). As a general rule, for static loads, approximately four square inches of tape should be used for each pound (57 cm² of tape per kg) of weight to be supported in order to prevent excessive creep. For dynamic loads a useful design factor is 12 lb/in2 (85 kPa) for most dynamic stresses in general applications.
Tape Thickness	Achieving good contact is also important. The necessary thickness of tape depends on the rigidity of substrates as well as their flatness and/or irregularity. While 3M™ VHB™ Tape will conform to a certain amount of irregularity, they will not flow to fill large gaps between the materials. When bonding rigid materials with normal flatness, consider use of tapes with thickness of 45 mils (1.1 mm) or greater. As substrate flexibility increases, thinner tapes may be considered.
Thermal Expansion/Contraction	3M™ VHB™ Tapes perform well in applications where two bonded surfaces may expand and contract at different rates. Assuming good adhesion to both substrates, VHB™ Tape can typically tolerate differential movement in the shear plane up to 3 times (300%) of their thickness.
Bond Flexibility	While an advantage for many applications where allowing differential movement is a benefit, the tape bonds are typically more flexible than alternative fastening methods. Suitable design modifications or periodic use of rigid fasteners/adhesives may be necessary if additional stiffness is required.

Next Steps

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