A method of forming an end seal on a cable is provided. The method includes providing a curable sealant in a cavity formed in a boot, inserting an end of the cable in to the cavity with the boot extending about the exterior of the cable, forcing the cable in to the curable sealant whilst inhibiting the egress of curable sealant from the boot to force the curable sealant along the interior of the cable, curing the curable sealant to provide a stable load supporting layer of sealant within the cable, and applying a crimping ring to the boot in the area of the load supporting layer to secure the boot to the cable.