A fully formulated system for producing visco elastic polyurethane foams that offers the best-in-class reduction of resonance peak height at all frequencies, excellent ultra-low emission interiors test, fast curing, and excellent flowability with wide process latitude. HVE SPECFLEX™ -CIR Acoustical Foam Systems C can contain 60% circular content and > 40% in CO2 reduction according to Service to Society Together for Sustainability (TfS).