In summary, the L37-3 series of thermally conductive gap fillers from T-Global covers the thermal conductivity range from 1.4 to 1.9 W/m.k and is available in a number of formats to suit various applications. Design guidelines for this product include using compression of 20 to 45% for optimal performance, and the products should only be used within the temperature range of -40°C to +200°C. L37-3 series products can be reworked; however T-Global strongly recommends replacing the pads after use to prevent contamination. The shelf life of the L37 products without adhesive is one year; with an adhesive, this is reduced to six months.