3M™ VHB™ Tape 4941 is a grey, double-sided, pressure-sensitive acrylic foam tape with a thickness of 45 mil (1.1 mm). It features a multi-purpose acrylic adhesive on both sides of a conformable foam core, offering a strong, permanent bond that can replace mechanical fasteners like rivets, welds, and screws. Here are its key specifications based on available information:

Thickness: 45 mil (1.1 mm)
Adhesive: Multi-purpose acrylic
Core: Conformable acrylic foam
Liner: Available with a 3 mil 54# densified kraft paper liner (4941) or a 5 mil red polyethylene film liner (4941F)
Bonding Strength: High shear strength, excellent conformability, and adhesion to high and medium surface energy substrates such as aluminum, stainless steel, galvanized steel, composites, plastics (e.g., acrylic, polycarbonate, ABS), rigid PVC, plasticized vinyls, and painted or sealed wood and concrete
Temperature Resistance: Can withstand temperatures up to 200°F (93°C) for short-term exposure; long-term durability in extreme conditions (e.g., UV, moisture, and solvents)
Plasticizer Resistance: Good resistance to plasticizers, making it suitable for bonding to materials like plasticized vinyls
Applications: Ideal for stiffener bonding, sealing polycarbonate lenses over LCDs, attaching windows to painted control panels, mounting vinyl wiring ducts and conduit channels, and bonding painted metals in architectural cladding or truck assembly
Durability: Offers long-term durability, cushioning, damping, and impact resistance; UL listing 746C for specific applications
Bonding Time: Provides immediate handling strength upon contact, achieving full bond strength in approximately 72 hours
Viscoelasticity: Allows design flexibility by conforming to irregular surfaces and bonding dissimilar materials
The tape is designed for industrial and occupational use, not for consumer applications, and should be used in compliance with safety regulations (e.g., OSHA, ANSI). It’s available in various sizes, such as 1/2 in x 36 yd, 1 in x 36 yd, or 24 mm x 33 m, depending on the supplier. For precise sizing or custom cuts, consult with a 3M representative or authorized distributor.