Urea-formaldehyde resins are synthetic polymers created by the reaction of urea and formaldehyde. These resins are commonly used in the production of adhesives, coatings, and composite wood products due to their strong bonding properties and quick curing times. They are often found in items like particleboard and plywood. These resins are valued for their cost-effectiveness and versatility, but they can release formaldehyde gas, which may pose health risks. As a result, manufacturers often seek to minimize emissions and improve the safety of products made with urea-formaldehyde resins.