The invention provides modified sulphur prepared by admixing molten elemental sulphur with one or more olefinic sulphur modifiers, wherein at least 50 wt % of the olefinic sulphur modifiers is 5-ethylidene-2-norbornene and/or 5-vinyl-2-norbornene and wherein the total amount of olefinic sulphur modifiers is in the range of from 0.1 to 20 wt % based on the weight of sulphur. The invention further provides a product comprising such modified sulphur as binder which is prepared by admixing such modified sulphur, a filler and/or aggregate, and optionally elemental sulphur at a temperature above the melting temperature of sulphur and solidifying the mixture obtained by cooling the mixture to a temperature below the melting temperature of sulphur.