3M 4991 VHB Nastro acrilico espanso double-sided, grigio, 19 mm x 5,5 m, spessore 2,3 mm, High Bond 7000033143

With a 2.3 mm conformable acrylic foam core and 3M's Very High Bond adhesive, this grey double-sided tape delivers exceptional shear and peel strength for permanent bonding of metals, glass, and many plastics.

Overview

The 3M 4991 series tape features a grey, conformable foam backing coated on both sides with a high-performance acrylic adhesive. It measures 19 mm wide and 5.5 m long, with a total thickness of 2.3 mm. The red polyethylene liner protects the adhesive until application and is removed during installation.

What stands out

• Very High Bond (VHB) acrylic adhesive provides strong, durable bonds on high and medium surface energy substrates.
• Conformable foam backing compensates for surface irregularities and differential thermal expansion.
• Excellent resistance to UV, moisture, and temperature extremes, suitable for indoor and outdoor use.
• High shear and peel adhesion for demanding mounting and joining applications.

Technical details

• Tape type: Double-sided adhesive tape
• Adhesive material: Acrylic
• Backing material: Conformable foam
• Colour: Grey
• Length: 5.5 m
• Width: 19 mm
• Thickness: 2.3 mm
• Short-term temperature resistance: up to 150 °C
• Long-term temperature resistance: up to 93 °C
• UV resistance: High
• Moisture resistance: Excellent
• Liner type: Red polyethylene film
• Suitable for outdoor use: Yes

Our verdict

A reliable VHB tape for permanent bonding where high strength and environmental resistance are required.