Kulowetsedwa kwa vacuum ndi njira yomwe imagwiritsidwa ntchito popanga zida zophatikizika.Pochita izi, preform yowuma (monga fiberglass kapena carbon fiber) imayikidwa mu nkhungu, ndipo chopukutira chimayikidwa kuti chichotse mpweya mu nkhungu.Kenako utomoni umalowetsedwa mu nkhungu mopanikizika ndi vacuum, zomwe zimalola kuti ulusiwo ukhale wofanana.Kuthamanga kwa vacuum kumathandizira kuwonetsetsa kulowa kwathunthu kwa utomoni ndikuchepetsa voids mu gawo lomaliza.Gawolo litalowetsedwa mokwanira, limachiritsidwa pansi pa kutentha ndi kupanikizika.
