Ọ gwụla ma akọwapụtara ya, a ga-echekwa ngwaahịa polyester resin na nkụ, jụụ na mpaghara ihe akaebe mmiri. Ejirila ya n'ime ọnwa iri na abụọ mgbe emechara ụbọchị. Resoninglọ polyester polyster nke polyester kwesịrị ịnọ na nkwakọ ngwaahịa mbụ ha ruo mgbe tupu iji. Ngwaahịa resin na-adịghị mma maka nnyefe site n'ụzọ ụgbọ mmiri, ụgbọ oloko, ma ọ bụ gwongworo.