1. 
   insulant
   substance in which the valence band is a filled band separated from the first excitation band by a forbidden band of such width that the energy needed to excite electrons from the valence band to the conduction band is so large as to disrupt the substance
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=521-02-31
   
   
2. 
   insulant
   1) Building material 2) Insulating material 3) Insulation
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/insulant/1
   
   

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