Analyzing the Cost-Effectiveness of Different Polyurethane Glue Anti-Yellowing Agents Introduction: The Golden Glow We Want to Avoid 🌞❌ Polyurethane glue is a superhero in the world of adhesives — strong, flexible, and versatile. But like all heroes, it has its Achilles’ heel: yellowing. Over time, especially when exposed to UV light or heat, polyurethane glue...