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VHB™ Structural Metal Cladding Tape

W20F

Technical Data

06/2006

Product Description

3M™ VHB™ Structural Metal Cladding Tape is a high performance

double-coated pressure sensitive acrylic foam tape. It is used to attach

metal sheets to metal frames in façade curtain wall systems replacing

commonly used mechanical fasteners, gaskets or structural silicone

sealants. Application performance and test results demonstrate the

outstanding durability, and temperature performance of 3M™ VHB™

Tape acrylic foam chemistry.

Application Requirements All 3M™ VHB™ Tapes cladding projects must be reviewed on a

project-specific basis by a 3M representative to begin the structural

cladding process. 3M Sales and Technical Service Specialists are

available to assist the customer to determine the suitability of 3M™

VHB™ Structural Metal Cladding Tape for structural cladding

applications.

VHB™ W 20 F

Adhesive

High Performance Acrylic

Adhesive Carrier

Conformable Acrylic Closed Cell Foam

Color

White

Thickness

2.0 mm ± 10%

Density

kg/m³

720

Liner

Red Polyethylene Film

Construction

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Typical Physical

Properties and

Performance

Characteristics:

VHB™ W 20 F

Note: The following technical information and data should be considered representative or

typical only and should not be used for specification purposes.

Temperature resistance

long term

short term

°C

150

200

Peel adhesion

(N/100mm)

according to A.F.E.R.A. 4001;

after 72 h, speed 300

mm/Min.;Angle 90°; RT; Steel

350

Tensile

(N/cm²)

ASTM D-897, nach 72 h, Al

50 mm/Min.; 6,45 cm²; RT

(=950 kPa)

Dynamic Shear

(N/cm²)

ASTM D-1002; after 72h; steel;

12,7 mm/min; 6,45cm; RT

(=480 kPa)

1500

1000

750

Static Shear

static

(g)

according to

A.F.E.R.A. 4012,

after 72 h RT; Steel;

>10.000 Min.; 3,23

cm²;

20°C

65°C

90°C

120°C

150°C

180°C

Caution: The higher the temperature the more the

viscous characteristic of the tape will dominate.

Always do tests according to your construction.

For tape area calculation the following guidelines can be used. Please ensure that each

project is reviewed and approved by local 3M Technical Service.

Tape Design Strength

dynamic loads

(deadload support)

For dynamic tensile or shear loads (such as

windloads), a design strength of

8435 kg/m

or 85 kPa

is used for VHB™ Structural Glazing Tape. This

design strength guideline provides a safety factor

of at least 5 and was established based on

material property testing as well as ASTM dynamic

load testing for curtain wall applications.

Tape Design Strength

static loads

(no deadload support)

For static tensile or shear loads (such as dead

weight loads, snow loads and other long-term

loads), a design strength of

1735 kg/m² or 1.7 kPa

can generally be used. This means that 60 cm²

VHB™ per 1 kg load should be used to support

static loads. This guideline provides a safety factor

of at least 5.

Important: Static load and dynamic load calculations should be performed on unsupported

deadload structural glazing applications. The calculation resulting in the wider tape width should

be used as the appropriate tape width for the application.

Note: Always round up to the nearest whole number dividible by 5 and never round down for

metric (mm) calculations.

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Available Sizes:

VHB™ W 20 F

Standard Length (m)

(other length on request)

16.5

Standard Width (mm)

(other width on request)

15, 20, 25, 30, 35, 40

Width Tolerances (mm)

± 0,4 mm

Core Diameter

76,2 mm

Application Guidelines

Each 3M™ VHB™ Structural Metal Cladding Tape application will be

reviewed on a project specific basis. Application guidelines will be based

upon adhesion test results generated by 3M Technical Service. These

project specific application guidelines will be provided to the customer and

must be followed during the glass bonding process. Listed below are some

typical application guidelines for a 3M™ VHB™ structural glazing project.

However, these do not replace the project specific application guidelines

provided by the 3M Technical Service Representative.

For maximum bond strength, all surfaces should be thoroughly cleaned with

e.g. a 50/50 IPA/water mixture to remove contaminants. Glass surfaces

should be cleaned with a 70/29.5/0.5% mixture of IPA/water/silane solution

prior to tape application.

Surfaces may require additional surface preparation that will be determined

on a project specific basis. Ideal tape application is accomplished when

temperature is between 20°C and 38°C and the bond is allowed to dwell 72

hours. Initial tape application to surfaces at temperatures below 16°C is not

recommended. 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. Generally, this means

that the tape should experience at least 100 kPa in roll down or platen

pressure. After application, the bond strength will increase as the adhesive

flows onto the surface. At room temperature, approximately 50% of the

ultimate strength will be achieved after 20 minutes, 90% after 24 hours and

100% after 72 hours.

Product Use

All statements, technical information and recommendations contained in this

document are based upon tests or experience that 3M believes are reliable.

However, many factors beyond 3M’s control can affect the use and

performance of a 3M product in a particular application, including the

conditions under which the product is used and the time and environmental

conditions in which the product is expected to perform. Since these factors

are uniquely within the user’s knowledge and control, it is essential that the

user evaluate the 3M product to determine whether it is fit for a particular

purpose and suitable for the user’s method of application.

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Storage

Storage in original cartons at 21°C and 50% relative humidity.

Shelf Life

When stored under proper conditions product retains its performance and properties

for 12 month.

Limitations of

Remedies and

Liability

If the 3M™ VHB™ Tape is proved to be defective within the warranty period stated

above. THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL BE TO REFUND

THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE

3M™ VHB™ TAPE. 3M shall not otherwise be liable for loss or damages, whether

direct, indirect, special, incidental, or consequential, regardless of the legal theory

asserted, including negligence, warranty, or strict liability.

3M Europe N.V./S.A.

Industrial Adhesives & Tape Devision

Hermeslaan 7

Email: umanert@mmm.com

Phone: +49 2131 14 2669

www.3M.com/industrial

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