Used as a crosslinking agent in polymer chemistry, particularly in the synthesis of thiol-ene networks. Its dual thiol groups enable efficient UV-initiated radical reactions with electron-deficient alkenes, forming highly uniform and stable polymer networks. Commonly applied in coatings, adhesives, and 3D printing resins where rapid curing and low shrinkage are required. Also utilized in the development of shape-memory polymers and functional hydrogels due to its flexible ethylene glycol-based spacer, which enhances chain mobility and material toughness.