Pini insulator, yotchedwanso polymeric pin insulator kapena polymeric line post insulator, imakhala ndi ndodo yotsekemera ya fiberglass yotetezedwa ndi nyumba (HTV Silicone Rubber) yomwe imayenera kukhazikitsidwa molimba pamapangidwe oyikamo pogwiritsa ntchito pini yodutsa mkati mwa nyumba yomwe imapangidwa kapena kuponyedwa ndimachitidwe oyipitsira mozungulira. Zinthu zakuthupi: Insulator yothandizirayi imapangidwa ndi ndodo yolumikizira, malaya amtundu wa silicon ndodo komanso kumapeto kwa zovekera.