Provided are methods for forming a rigid cable harness. An example method includes providing a curable sleeve comprising a curable compound, an adhesive, and a backing; wherein the curable adhesive tape has a longitudinal direction. The method further includes placing a plurality of cables on the sleeve in the longitudinal direction and wrapping the curable sleeve around the placed plurality of cables to form a cable harness, wherein the wrapping comprises wrapping the plurality of cables with the curable sleeve in the longitudinal direction. The method additionally includes positioning the cable harness into a desired shape and curing the curable compound of the cable harness to form the rigid cable harness, wherein the rigid cable harness has the desired shape.