O le fola vinyl heterogeneous o loʻo i totonu o le tele o laulau e ala i se faʻagasologa faʻapitoa e masani lava mai le pito i luga i lalo o le lima laulau, o latou o le UV faʻapipiʻi, faʻapipiʻi faʻapipiʻi, faʻapipiʻi lomitusi, faʻalava tioata tioata, maualuga elasticity layer poʻo le maualuga maualuga faʻapipiʻi faʻamaufaʻailoga ma faʻamaufaʻailoga pito i tua.