KINGSTON PU6021 is a high-performance, two-component polyurethane adhesive designed for the corner joining of aluminum alloy, steel-plastic co-extrusion, wood-aluminum composite, and aluminum-plastic composite window and door frames. It effectively bonds the corner bracket to the cavity wall of the profile, reinforcing the structure and preventing common issues such as cracking, dislocation, deformation and leakage. its advanced injection system ensures seamless application offering excellent adhesion, high strength, and durability, With diversified operating times and a sell-contains curing agent, PU6021 provides ease of use, fast curing, and a non-dripping, thixotropic formulation for reliable performance.