Abstract: Apparatus and methods provide an electrically isolating clamp that is suitable for use, among other locations, within a composite wing structure and other fuel environments. According to embodiments described herein, the clamp includes a clamp body and cushion. The clamp body is manufactured from a non-conductive material and includes a strap and a base. The cushion may be manufactured from a different non-conductive material to provide at least two layers of electrical isolation between the tube or other object being secured and a structure. The cushion material allows for axial movement of the tube through the cushion. The cushion is disposed between the strap and the base. Shoulder flanges prevent axial movement of the cushion with respect to the clamp body. The clamp may have a cushion retention mechanism to secure the cushion within the strap prior to installation around the tube.