Beyond Boats and Bathtubs: Unveiling the Unexpected World of Unsaturated Polyester Resin (UPR) Unsaturated polyester resin (UPR) might conjure images of sturdy boats gliding through waves or gleaming bathtubs in modern bathrooms. But this versatile material's story goes far beyond the aquatic and the hygienic. UPR is a shape-shifting magician, its potential hidden in plain sight,…