UL Standards & Engagement (ULSE) is the nonprofit standards development organization within the UL enterprise. Accredited by ANSI, it develops, maintains, and publishes consensus-based UL safety standards used globally by manufacturers, regulators, and certification bodies across electrical, building, industrial, and consumer sectors.
In the chemicals and materials domain, UL Standards & Engagement oversees key material performance standards and test methods—such as those for polymer flammability (UL 94), plastics for electrical and electronic applications (UL 746 series), and indices related to thermal endurance and electrical tracking (RTI, CTI). These specifications underpin product design and compliance for resins, composites, wire and cable materials, batteries, and housings used in power electronics and other high-stress environments.
ULSE convenes industry, academia, government, and safety experts to develop requirements and supports harmonization with national and international standards, including binational standards with Canada. While it does not certify products, its standards provide the benchmark criteria against which products are tested and certified by independent laboratories.