polyurethane dimensional stabilizer: enhancing stability in pour-in-place insulation abstract: pour-in-place (pip) polyurethane (pu) insulation offers exceptional thermal performance and versatility in construction applications. however, dimensional instability, particularly shrinkage and expansion due to temperature and humidity fluctuations, poses a significant challenge. polyurethane dimensional stabilizers (puds) are crucial additives that mitigate these issues, enhancing the long-term performance...