Shrinking should be done at a temperature of +340 °C +/-10 °C. (At approx. +327 °C the appearance of PTFEGlossaryPTFEPolytetrafluoroethylene changes from white to transparent). Please note that the part to be coated has to withstand the shrinking temperature. Temperatures exceeding +350 °C lead to overheating of the heat shrinkable tubing and destroy its plastic memory (shrinking capacity). Thus, the tubing becomes unusable. Steady heating and cooling from all sides provides the best result, otherwise creases and tearing can arise. Appropriate heat sources are ovens or air heaters. We strongly advise against using gas flames as this can lead very easily to irregular overheating. Longitudinal shrinkage can occur during shrinking. The longitudinal shrinkage is approx. 15 %.
Use adequate ventilation to assure removal of toxic vapours which may be produced by overheating!