3M VHB 4991F Grey Acrylic Double-Sided Tape (various options)

3M™ VHB™ 4991F is a 2.3 mm thick, high-strength, flexible acrylic tape designed for permanent bonding of a wide range of high and medium surface energy substrates. The flexible foam core is coated with a modified acrylic adhesive, providing excellent adhesion to aluminum, stainless steel, galvanized steel, polycarbonate, and ABS, among others. The tape offers very good resistance to plasticizers, aging, UV radiation, and solvents. It is designed for indoor and outdoor use, providing durable and aesthetic bonds without the need for drilling, riveting, or welding.

Technical specification

• Width: 12 mm, 19 mm, 25 mm
• Length: 5.5 m, 16.5 m
• Thickness: 2.3 mm
• Colour: Grey
• Carrier material: Acrylic foam
• Adhesive type: Acrylic
• Type: Double-sided VHB™ tape
• Application: High and medium surface energy substrates

Application

• Permanent bonding of metals, plastics and composite materials
• Mounting panels, stiffeners and decorative elements
• Replacement for rivets, bolts, screws and welds
• Bonding to surfaces susceptible to plasticizers
• Outdoor and indoor applications in construction, electronics and industry

Benefits and properties

✅ Durable and strong bond – eliminates the need for mechanical fastening
✅ High resistance to UV, aging and solvents – reliability outdoors
✅ Excellent adhesion – effectiveness on a wide range of materials
✅ Resistance to plasticizers – ideal for modern plastics
✅ Flexibility and stress absorption – viscoelastic properties ensure durability
✅ Easy application – instant bonding without the need for additional tools

Application tips

Surfaces must be thoroughly cleaned and dried before application. The tape should be applied with even pressure, ensuring full contact with the surface. Full bond strength is achieved after 72 hours. The process can be accelerated by heating. Ideal for durable constructions requiring resistance to harsh conditions.