These butt splice heatshtrink connectors consist of a thermally stabilised heat shrinkable sleeving made up of an outer polyolefin tube coated on the inside with a meltable polyamide adhesive. After crimping with a suitable tool, the butt splice connector is simply heated with a hot air gun so that the outer sleeve shrinks and the adhesive melts and flows to give a watertight seal. Available in a range of colours these terminals offer superior performance over standard crimp terminals and, as usual from CMS Consumables - all at a great price!