Bergquist gap pad 2000s40 thermally conductive gap filling material bergquist gp2000s40 0040 02 0404 gap pad 2000s40 is a highly conformable reinforced gap filling material from bergquist that provides high thermal conductivity at very low mounting pressures this grey material is electrically isolating and is suitable for isolation between heat sinks and bare leaded high voltage devices fibreglass reinforcement of the material enables easier handling and superior puncture shear and tea