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.
3M 4991 TDS | |
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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 |
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