Plastic bonder is a quick-setting, two-part, urethane adhesive system that provides strong and lasting repairs and works on thermoset, carbon fiber composites, thermoplastics, coated metals, concrete and more. Plastic bonder has a 1 1 mixing ratio, sets in 15 minutes and can be sanded after 30 minutes. With a tensile strength of 3770 PSI, plastic bonder sets to a tan color and cures to a hard, permanent bond.