a pair of opposed walls in fig1 there are shown walls 10 and 12 which may represent the terminations of two sections 14 and 16 of a pair of slabs of a roadway which slabs are to be joined together since roadways of the type to which the present invention relates are not normally formed in continuous unbroken concrete sections gaps such as that between the walls 10 and 12 will exist between sections of the roadway accordingly it becomes necessary to seal or otherwise join together the walls 10 and 12 so that there will be formed a unitary structure which will nevertheless be capable of absorbing relative movements between the walls 10 and 12 which may occur during stressing or loading of the roadway a seal of the type contemplated for use with the present invention is shown in fig5 wherein the structure in accordance with the invention is depicted in its finished form as will be noted from fig5 a sealing element 20 which essentially comprises a longitudinal member of resilient material is interposed between the walls 10 and 12 the present invention is particularly concerned with the shoulder portions 100 and 120 which are formed adjacent the resilient joint formed by the sealing member 20 as will be noted from fig5 the basic slabs 14 16 which form the roadway are made from concrete if the portions occupied by the shoulders 100 and 120 are.