Isikhumba sokwenziwa senziwe ngePVC enogwebu okanye eqatywe kunye nePu kunye neefomula ezahlukeneyo ngesiseko selaphu lelaphu okanye ilaphu elingaphothiweyo. Inokucutshungulwa ngokweemfuno zamandla ahlukeneyo, umbala, i-luster kunye nepateni.
Ineempawu zoyilo olubanzi kunye nemibala, ukusebenza kakuhle kokungangeni kwamanzi, ukucoceka komphetho, izinga eliphezulu lokusetyenziswa kunye nexabiso eliphantsi xa kuthelekiswa nesikhumba, kodwa ukuvakala kwesandla kunye nokunwebeka kolusu oluninzi lokwenziwa alukwazi ukufikelela kwisiphumo sethwathwa. Kwicandelo layo le-longitudinal, unokubona imingxunya ye-bubble entle, isiseko selaphu okanye ifilimu engaphezulu kunye nemicu eyomileyo eyenziwe ngumntu.