Lub hauv paus yog tsim los ntawm cov txheej txheem yooj yim extrusion thiab qhov no yields lub cev tsis tshua muaj qhov hnyav nrog cov khoom siv zoo ib yam li nyob hauv ib lub plooj (veneers) nrog plhis. Lub tsev polymeric muaj kev tiv thaiv rau cov tub ntxhais no raws li muaj peev xwm tiv thaiv ntau tshaj qhov cuam tshuam kev puas tsuaj ntau dua li cov tsev me yaj hauv cov kab ua pa zoo nkauj. Lub tshuab hluav taws xob (insulator) feem ntau yog ib nrab rau ib feem plaub qhov hnyav ntawm cov pa plooj (porcelain) uas yooj yim. Qhov no txo cov nqi thauj, kev pheej hmoo ntawm kev puas tsuaj thaum thauj thiab teeb tsa thiab yooj yim kev teeb tsa. Ntxiv mus, lub tsev pheebsuab polymeric tso ib txwm tso rau cov kev ua rau nyias thiab ntau dua ntawm qhov chaw nyob ze nrog kev ua kom cov pa phem nyob ntev. Ntxiv rau, hydrophobicity ntawm polymeric tsev muaj kev ua tau zoo heev thiab tu tus kheej hauv qhov chaw muaj kuab paug. Thaum kawg, polymeric tsev tiv thaiv tus tub ntxhais los ntawm luv Circuit Court arc kev puas tsuaj uas tuaj yeem ua cov pa hluav taws xob cov pa hluav taws tso.
Feem ntau, feem ntau cov band ziab thiab cuam tshuam txog kev puas tsuaj rau cov kab hluav taws xob cuam tshuam tshwm sim ze rau qhov kawg fittings. Los ntawm tawm ib qho kev nthuav dav ntawm cov pob zeb ci ntawm cov pob zeb plooj (plooj plooj ntxhab ntxiv) ntawm lub sijhawm no ua ke nrog cov hluav taws xob tso hluav taws xob, qee qhov tawm ntawm cov dej khov kho dua li cov plooj plooj plooj plooj plooj plooj thiab tsis nyob rau lub tsev muaj ntau cov polymeric tsis muaj zog. Tsis tas li, cov khoom siv tseem ceeb tsis yooj yim ya raws cov teeb meem noo noo thiab, yog tias lub tsev nyob puas ntsoog, cov plooj (porcelain core) tseem tsis raug cuam tshuam los ntawm ya raws.
Cov ntxig hluav taws xob ua tau yooj yim los hloov ua cov khoom seem rau cov pa plooj (porcelain) uas siv los ntawm cov kab hluav taws xob hloov chaw, hloov pauv thiab cov kab hla kev. Ntxiv mus, kev tsim cov txheej txheem yooj yim los tswj piv rau crimping kawg fittings mus rau epoxy fiberglass tub ntxhais cov pas nrig, raws li ua rau cov ntxig hluav taws xob. Hybrid post insulators muaj peev xwm txawm suav nrog tib lipped thiab zoo nkauj kawg kom txais OHL conductors raws li siv rau ntawm cov pa kab ua ke.