FAQs
What is 3M VHB 4959 tape used for?
It is a double-sided acrylic foam tape used for permanent bonding and sealing, capable of replacing rivets, welds, and screws in many applications. It bonds metals, glass, and higher-surface-energy plastics and is used across transportation, signage, appliances, electronics, and general industrial assembly.
How thick is the tape and what color is it?
3M VHB 4959 is white and 0.120 in (3.0 mm) thick, built on a firm acrylic foam core with general-purpose acrylic adhesive on both sides. The foam thickness provides conformability and stress absorption, helping the bond withstand vibration and fatigue over long-term indoor and outdoor use.
What surfaces does it bond to?
The general-purpose adhesive bonds to a broad range of high-surface-energy substrates, including metals such as aluminum and stainless steel, glass, and easier-to-bond plastics like polycarbonate and ABS. For some surfaces, priming or specific surface preparation improves adhesion; consult 3M's guidance for demanding substrates.
Does the tape need curing or fixturing?
No. The pressure-sensitive adhesive bonds on contact to provide immediate handling strength, so no fixturing or cure time is required. Bond strength continues to build after application. This lets you eliminate drilling, welding, grinding, and clean-up while keeping joined surfaces smooth and finished-looking.
Is this tape suitable for electronics?
Yes. 3M VHB 4959 carries a UL 746C listing, which makes it suitable for a wide range of electronic products, and it offers good indoor and outdoor durability. As always, confirm the tape meets the specific requirements of your application and substrates before committing to production use.
