3M 4991

3M 4991 is a gray, 0.090 in (2.3 mm), multi-purpose acrylic adhesive with a conformable, foam core.
It can replace rivets, welds, and screws. The fast and easy-to-use permanent bonding method provides high strength and long-term durability.
It offers design flexibility with its viscoelasticity and powerful ability to bond to a variety of surfaces.

Brand: 3M
Model No.: 4991
Color: Grey
Thickness: 2.3 mm
Foam Density: 720 kg/m³
Width: Cutting customized width
Die-cutting: Any shape and any size
Samples: Free

Data Sheet

Features

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3M 4991 Data Sheet

3M 4991 TDS
Adhesive Type	Plasticiser Resistant
Thickness (ASTM D-3652)	2.3 mm
Foam Density	720 kg/m³
Adhesive Carrier	Acrylic Foam (Closed Cell)
Liner	Red Polyethylene Film
Tape Colour	Grey
Shelf Life	24 months from date of manufacture when stored in the original carton at 20°C & 50 % Relative Humidity
Peel Adhesion to Stainless Steel	35 N/10mm
Static Shear Strength (Stainless Steel)	1000 g @ 22°C 500 g @ 66°C 500 g @ 93°C
Temperature Performance Max (minutes/hours) Max Continuous (days/weeks)	120 °C 90 °C
Normal Tensile (Aluminium T-Block)	415 kPa
Solvent Resistance	High

3M 4991 Features

The fast and easy-to-use permanent bonding method provides high strength and long-term durability
Virtually invisible fastening keeps surfaces smooth
Can replace mechanical fasteners (rivets, welds, screws) or liquid adhesives
Gray, 0.090 in (2.3 mm), multi-purpose adhesive, and conformable acrylic foam core offers a good balance of strength and conformability
Eliminate drilling, grinding, refinishing, screwing, welding, and associated clean-up
Creates a permanent seal against water, moisture, and more
Pressure-sensitive adhesive bonds on contact to provide immediate handling strength
Allows the use of thinner, lighter weight, and dissimilar materials