Released in late May 2026, the latest polyurethane processing documents define mature manufacturing standards for single-component and two-component PU materials, boosting quality improvement across waterproofing, adhesive and electronic encapsulation industries. Two-component PU consists of polyol Part A and isocyanate Part B, solidified via crosslinking between hydroxyl and -NCO groups. Raw materials must keep moisture below 0.05%, with the molar ratio of -NCO/-OH controlled from 1.05 to 1.2:1. Featuring adjustable formulas and superior mechanical performance, it serves high-end elastomers and heavy-duty anti-corrosion projects. Single-component PU adopts moisture-curing mechanism based on NCO-terminated prepolymers. Its production includes raw material dehydration, temperature-controlled synthesis below 80℃ and low-temperature curing, requiring no on-site blending during construction, ideal for construction caulking and electronic sealing. Meanwhile, manufacturers keep upgrading bio-based polyol formulas to lower carbon footprint of PU products. For more information: https://www.tiktok.com/@mia_iota/video/7597717976720149782