Is polyurethane a good or bad material?

Polyurethane is both a good and bad material depending on how you use it and what you value, as it has significant advantages and disadvantages. As a good material, it is extremely versatile, durable, abrasion resistant, water resistant, and affordable, which is why it is used everywhere from hardwood floors and furniture finishes to mattresses, car seats, shoe soles, insulation, and faux leather. It provides excellent protection for wood, is easy to apply, and extends product life. As a bad material, uncured polyurethane contains isocyanates and volatile organic compounds that are toxic during application and can cause respiratory issues, and its production relies on petrochemicals. Cured polyurethane is a plastic that does not biodegrade easily and can contribute to microplastic pollution over decades as it breaks down. Some cheap polyurethane foams off-gas and contain flame retardants that raise health concerns. Environmentally, it is not sustainable and is difficult to recycle. So polyurethane is good for performance, protection, and cost, but bad from an environmental and chemical exposure standpoint during manufacturing and disposal. Many people consider it a necessary compromise material that is excellent for durability but not ideal for eco-friendliness.