3M 4943F DATA SHEET

VHB Acrylic Foam Tape 4943F

Product Data Sheet

Updated : Sept. 2002
Supersedes : May 2002

Product Description

4943 is a conformable, very high bond acrylic foam tape which has added performance for
bonding at low temperatures (above 0 °C). In addition this adhesive composition makes
the product well suited to a variety of substrates.
Its improved conformability also allows more complete bond contact area when bonding
rigid or irregular materials. 4943's principal advantage is that it provides a more uniform
seal on irregular surfaces.
Resistance to solvents, temperature extremes and U.V. light make VHB products
suitable for many interior and exterior applications.

Physical Properties

Not for specification purposes

Adhesive Type

Acrylic

Thickness (ASTM D-3652)

Tape
Liner
Total

1.1 mm ± 10%

0.05 mm

1.15 mm

Foam Density

720 k/gm³

Release Liner

Clear Film

Tape Colour

Grey

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

44.0 N/10mm

Static Shear Strength

weight held for 10,000 mins to stainless steel
with ½ sq in (3.23 sq cm) overlap

1000 g @ 20°C
500 g @ 70°C

Normal Tensile (T­Block)

to Aluminium at room temp,

6.45 sq cm, jaw speed 50 mm/min

585 kPa

2

Date : Sept. 2002
VHB Acrylic Foam Tape
4943F

Performance
Characteristics (Cont...)

Not for specification purposes

Temperature
Performance

(Minutes/Hours)
(Days/Weeks)

150 °C

90 °C

Solvent Resistance

Splash testing cycle - 20 seconds submersion

- 3 cycles.

No apparent degradation when exposed to splash testing
of most solvents including gasoline, JP-4 jet fuel, mineral
spirits, motor oil, ammonia cleaner, acetone, methyl ethyl
ketone. 20 seconds air dry.

UV Light Resistance

Excellent.

Additional Product
Information

Bond strength is dependent upon the amount of adhesive-to-surface contact developed.
Firm application pressure develops better adhesive contact and thus improves bond
strength.

To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified.
Typical surface cleaning solvents are isopropyl alcohol/water mixture (rubbing alcohol) or
heptane. Use proper safety precautions for handling solvents.

It may be necessary to seal or prime some substrates prior to bonding.

a. Most porous or fibred materials (e.g. wood) will require sealing to provide a unified

surface.

b. Some materials (e.g. copper, brass, plasticised vinyl) will require priming or

coating to
prevent interaction between adhesive and substrates.

Acrylic Foam Tape 4943F utilises a unique low temperature acrylic adhesive which allows
initial applications to be made at temperatures as low as 0°C.

At room temperature the adhesive is very aggressive and provides excellent initial
adhesion to many surfaces.

• Low temperature application.

Most high performance pressure sensitive acrylic adhesives have very low initial tack at
temperatures below 0°C. Acrylic Foam Tape 4943F was designed to allow outdoor
assembly of signs and construction materials and assembly of cold materials in large
manufacturing plants above 0°C.

• Room temperature applications.

At room temperature 4943F offers better tack/quick stick than other tapes in the VHB
family. This can be important in a wide range of applications where a more aggressive
adhesive is desirable.