With care all the PC 93/94 series can be reworked.  However, T-Global strongly recommends that the pads are replaced after use as this prevents contamination. The shelf life of all gap fillers without an adhesive layer is one year.  For gap pads with an adhesive this is reduced to six months. All the products in this series will pass industry standard thermal cycling and aging tests without detriment. No loss of performance is measurable after the standard tests have been performed.