From Longman Dictionary of Contemporary Englishinsulating tapeˈinsulating ˌtape noun [uncountable] TPEa type of sticky tape used for wrapping around electric wires to insulate them
Examples from the Corpus
insulating tape• Sellotape insulating tape for fixing plants to stakes; and Sellotape Outdoor Sticky Fixers for fixing hooks, and similar greenhouse items.• I went to close the curtains and found the windows sealed with silver insulating tape.• Otherwise you can only tuck insulating tape in the cracks or fit draught-proofing strips as for doors. 