The reaction between sulfur and dicyclopentadiene (DCPD) has been investigated for nearly half a century, providing a processible form of sulfur useful in the construction and composites industries. In these applications, the sulfur is primarily unreacted elemental sulfur dissolved or "plasticised" in a solution of low molecular weight polysulfides derived from a relatively low feed ratio of DCPD (typically 25% or less by mass). These mixtures can be processed as liquids at elevated temperatures (~130-140 °C) and used as mortar for concrete buildings, 2 sealants for tailings ponds, or reinforcement for plastic and glass fibres. Recently, we revisited copolymerisations of sulfur and DCPD, establishing how the feed ratio can be used to tune the thermal and mechanical properties of these polymers. In these prior studies, sulfur was fully incorporated into the final, cured polymer, distinguishing these materials from the earlier sulfur plasticisation studies.