Weld-On 16 Cement is a clear and thick cement for industrial grade acrylic. Use on irregular edges, especially when high-strength (not bubble-free) joints are required. Good outdoor weatherability. Weld-On 16 is especially formulated to bond acrylic plastic. It can also be used for bonding styrene, butyrate, PVC and polycarbonate, as well as other plastics and porous surfaces.