4956 - VHB™ Double Coated Acrylic Foam

3M

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ADHESIVE TAPE FEATURES

Gray closed-cell foam carrier
Static Shear measured at 72°F and loadings on stainless steel will hold 1,000 rams over 10,000 minute per ASTM D-3654
Dynamic shear to stainless steel ASTM D-1002: 70lb/sq. in
Density: 45#/ft cubed
Also available with a 5 mil clear polyethylene film liner 4956F

ADHESIVE TAPE ADVANTAGES

High tensile strength
High shear and peel adhesion
Resistant to solvents
Resistant to moisture & plasticizers
U.L. reconition
Low outgassing
Conformable
UV Resistant

ADHESIVE TAPE APPLICATIONS

Bond muntin bars to windows
Bond & seal polycarbonate lens over LCD
Bond pre-painted metals in truck assembly
Mount vinyl wiring ducts and conduit channels
Bond & seal plastic windows to pre-painted control panels/switch gear
Replace rivets
Bonding a variety of substrates, including most metal, sealed wood and glass, as well as many plastics, composites and painted surfaces

ADHESIVE TAPE MARKETS SERVED

Construction
Window
Truck & Trailer body
Metal sheds
Electrical
Electronics

ADHESIVE TAPE COLORS

Gray

GENERAL INFORMATION

3M 4956 is a 62 mil, VHB™ double-coated, conformable acrylic foam. 4956 is the main product when conformability is necessary. 4956 utilizes multi-purpose acrylic adhesive on both sides of a conformable foam. It has excellent adhesion to a broad range of high and medium surface energy substrates including metals, glass and a wide variety of plastics and plasticized vinyl. In many cases 4956 can replace rivets, spot welds, liquid adhesives or other permanent fasteners.

PRODUCT CONSTRUCTION

	Type	Mil Thickness

Backing	Acrylic Foam
Adhesive (unwind)	Acrylic
Adhesive (liner)	Acrylic
Liner Type (outer)	Paper (3mil, 54# white densified kraft printed)
Foam Cell Type	Closed
Thickness (total)		62.00

PRIMARY PHYSICAL PROPERTIES

	Unwind Side	Liner Side

Adhesion-to-Steel - 90° Peel	320.00 oz/in	320.00 oz/in
Adhesion Dynamic Shear	1120 oz/in	1120 oz/in
Adhesive Activation	Pressure
Tensile Strength	65.00 lbs/in
Testing Info: 90 degree peel: ASTM D3330; Tensile: ASTM D-897; Dynamic overlap shear ASTM D-1002

SECONDARY PHYSICAL PROPERTIES

Water Resistant	Yes
UV Resistant	Yes
Solvent Resistant	Yes
Plasticizer Resistant	Yes

THERMAL / ELECTRICAL PROPERTIES

Minimum Application Temperature	60°F
Minimum Service Temperature	-40°F
Maximum Long-Term Temperature	300°F
Maximum Short-Term Temperature	200°F

Adhesive Tape and Foam Converting Services

The physical properties listed are typical values and are not to be considered as specifications. Our suggestions for use are based on tests we believe to be reliable. However, the purchaser must carry out their own tests to determine the suitability of the product for their internal use. Information is given in good faith, but without warranty.
It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied be clean, dry and free of grease and oil.
Shelf life from date of manufacture is based on the product being stored at 70°F(21°C) / 50% relative humidity out of direct sunlight.
Specification compliance is dynamic and should only be used as a general guide. Always confirm that the tape you are interested in currently complies with all specification requirements. Please verify that the product number that you select is available in the proper size and color to meet your specification.