In conclusion we have reported a new sequence selective terpolymerisation of elemental sulfur delivering polyester featuring dynamic oligosulfide units. Sequence selectivity is achieved on kinetic grounds in which coordinative participation of polyester links adjacent to the chain-end lead to a rate increase as they represent better donors. The exceptionally broad monomer scope gives straightforward access to a wide glass transition temperature range as well as functional side chains. The improved thermal stability renders the backbone editable via insertion into the -S-S-bonds. Crosslinking of aldehyde functionalised polymer via imine condensation yield thermally reprocessable adhesive in which backbone editing can be used to enhance adhesive performance while the imine bond grant acid degradability. Our contribution demonstrates how mechanistic understanding achieves to impart the dynamicity of elemental sulfur into a popular class of polymers, namely polyester, with tuneable properties and functionality.