Sulfur is an underused by-product of the petrochemicals industry.R ecent research into inverse vulcanization has shown how this excesss ulfur can be transformed into functional polymers, by stabilization with organic crosslinkers. For these interesting new materials to realize their potential for applications,m ore understanding and control of their physical properties is needed. Here we report four new terpolymers prepared from sulfur and two distinct alkene monomers that can be predictively tuned in glass transition, molecular weight, solubility,m echanical properties, and color.