The strongest glue for plastic depends on the type of plastic and the intended use. For general use, cyanoacrylate (super glue) is a good option
. However, for bonding specific types of plastic such as ABS and PC+PBT to aluminum, it is best to seek out an adhesive specifically designed for plastic bonding. Loctite, JB Weld, and various other brands make plastic-specific epoxies that will work well
. Some other options for bonding plastic include Infinity Bond MMA 500, Infinity Bond Rubber and Plastic Super Glue Cyanoacrylate, and Infinity SuperTAC 500 Plastic Bonding Glue Stick
. The 3M Scotch-Weld Plastic & Rubber Instant Adhesive PR40 is also a strong option with an overlap shear strength of over 2,000 psi
. It is important to follow the instructions carefully for best results.
