Permabond UV639 is a specialized UV-curing adhesive engineered for superior bonding performance on plastics, particularly excelling with acrylic, polycarbonate, and PETG materials. This versatile adhesive also effectively bonds glass and metals, making it ideal for diverse applications. Its standout feature is the crystal-clear, non-yellowing finish that cures rapidly under UV light, perfect for applications where visual aesthetics are crucial. The thicker gel consistency allows for excellent gap filling and vertical applications while maintaining high strength and flexibility with over 220% elongation. With operating temperature resistance up to 212°F at 60% strength, it's suitable for demanding environments. The adhesive offers impressive bonding strength, achieving up to 1160 PSI on polycarbonate and 1000 PSI on glass-to-steel applications. Its unique properties make it perfect for shop fittings, retail displays, furniture assembly, and architectural applications where traditional mechanical fasteners can be eliminated for cleaner designs.