3M™ Scotch-Weld™ Epoxy Adhesive EC-3537-NA B/A is a two-part epoxy adhesive that cures at room temperature to form a tough, flexible bond. The cure rate can be accelerated with mild heating. We formulated this off white, highly flexible, thixotropic adhesive to meet aerospace bonding requirements on metal and plastic substrates. Its non-sagging thixotropic formula holds its shape and permits application on vertical or horizontal surfaces. The two-part formula features two contrasting colors (gray and white), to permit visual inspection of mixing effectiveness.