3M 4905F DATA SHEET

VHB Acrylic Foam Tape 4905F

Product Data Sheet

Updated : Sept. 2002
Supersedes : March 1996

Product Description

4905 is a clear acrylic VHB tape. It is colourless making it ideal for bonding transparent
materials or for applications where a coloured bond line is unacceptable.
These tapes have somewhat lower peel, tensile and shear performance than most other
VHB due to their inherent softness.

Physical Properties

Not for specification purposes

Adhesive Type

Acrylic

Thickness (ASTM D-3652)

Tape
Liner
Total

0.50 mm

0.13 mm

0.63 mm

Density

960 kg/m³

Release Liner

Filmic (Red)

Tape Colour

Clear This tape product is clear in

colour but NOT guaranteed
to be optically clear.

Shelf Life

24 months from date of despatch by 3M when stored in the
original carton at 20°C & 50 % Relative Humidity

Performance
Characteristics

Not for specification purposes

Peel Adhesion to
Stainless Steel

90° peel @ room temp, 72 hr dwell,
jaw speed 300mm/min

21 N/10mm

Normal Tensile (T­Block)

to Aluminium at room temp,

6.45 sq cm, jaw speed 50 mm/min

690 kPa

Static Shear Strength

½ sq inch overlap on Stainless Steel 1000
minutes

1000g at 22°C

500g at 66°C
500g at 93°C

Temperature
Performance

Max (hours/minutes)
Max Continuous
(days/weeks)

150 °C

90 °C

UV Light Resistance

No change in clarity was seen after 346 hours QUV.

2

Date : Sept. 2002
VHB Acrylic Foam Tape
4905F

Surfaces

This product bonds to
high energy surfaces
such as glass, acrylic
sheet and metals.

Painted surfaces and
varnishes should be evaluated.

Bonding to Polypropylene
and rubbers is not
recommended.

Application Techniques

1. Bond strength is
dependent upon the
amount of adhesive -to­surface contact developed.
Firm application pressure
develops better adhesive
contact & thus improves
bond strength.

2. To obtain optimum
adhesion, the bonding

surfaces must be clean dry
and well unified. A typical
surface cleaning solvent is
isopropyl alcohol & water.
Use proper safety
precautions for handling
solvents.

3. Ideal tape application
temperature range is 20°C
to 40°C.

Initial tape application to
surfaces at temperatures
below 10°C is not
recommended because the
adhesive becomes too firm
to adhere readily. However
once properly applied low
temperature holding is
generally satisfactory.

Applications

VHB Joining Systems are
suited for use in many
interior and exterior
industrial applications. In
many situations, they can
replace rivets, spot welds,
liquid adhesives, and other
permanent fasteners. Each
product in the VHB family
has specific strengths.
These can include high
tensile, shear and peel
adhesion and resistance to
solvents, moisture and
plasticiser migration. All
VHB fasteners should be
thoroughly evaluated by the
user under actual use
conditions with intended
substrates, especially if
expected use involved
extreme environmental
conditions.

VHB Joining Systems are
suitable for bonding a
variety of substrates,
including sealed wood,
many plastics, composites
and metals. Plastics which
can be a problem are
polyethylene, polypropylene,
teflon, silicones and other
low surface energy
materials.

Plasticised vinyl bonding is
dependent upon the types
and concentrations of
plasticisers which can
migrate into the adhesives
causing a reduction in bond
strength; 4945 is most
resistant to plasticiser
migration.

Galvanised surfaces are
potential problems and
should be carefully
evaluated.

To prevent corrosion on
copper and brass, only
lacquer coated material
should be used with VHB
Joining Systems.

Thorough evaluations are
recommended when
bonding is required to any
questionable surface.

3M and VHB are trademarks of the 3M Company.

Values presented have been determined by standard test methods and are average values not to be used for specification purposes.
Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your
own tests to determine their suitability for your applications.
This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our
recommendations.

Tapes & Adhesives

 3M United Kingdom PLC 1996

3M United Kingdom PLC
3M House,
28 Great Jackson Street,
Manchester,
M15 4PA

Product Information :

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3M Ireland
3M House, Adelphi Centre,
Upper Georges Street,
Dun Laoghaire,Co. Dublin,
Ireland

Customer Service :

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