a modular , reusable installation tool for clamping laid - together portions of cross - linked , dimensionally heat unstable polymeric material along a to - be - formed bond line during the application of heat from an external source to form a bond between clamped portions of the material . the tool comprises an assembly of hand - operated clip modules which are threaded longitudinally on a cable to facilitate their rapid one - hand installation and removal along a bond line . an improved modular clip is disclosed which incorporates a pair of bond line gripping flanges attached to a pair of ventilated cooperating jaw plates .