A na-eji ọkpọkọ drainage KML na akwa akwa maka mmiri mkpofu nwere griiz nke kichin ọkachamara na akụrụngwa ndị yiri ya.
Mkpuchi dị n'èzí: Buru mkpuchi zinc ịgbasa na njupụta mpaghara nke min 130g/㎡, na n'elu nke ahụ mkpuchi epoxy nke opekempe 70um.
N'ime mkpuchi bụ orche-acha epoxy.A okpukpu abụọ oyi akwa nke resin epoxy na a ngụkọta oyi akwa ọkpụrụkpụ 240um.
A na-ekpuchi akwa akwa KML n'ime na n'èzí jiri epoxy ntụ ntụ dị elu nke opekata mpe 120um.