If you are thinking of buying this you can save yourself a lot of time and hassle just by burning your money. This stuff just doesn't work. All but one of the heatsinks fell off due to gravity within an hour of application. Everything was cleaned properly with alcohol before use. In any case, the tape stuck fairly firmly to the perfectly smooth aluminum and copper heads and had almost no adhesion to the rough plastic shavings you might want to attach heatsinks to.