New ụdị waterproof ihe onwunwe nwere elu arụmọrụ nke mgbochi permeability, mmiri-proofness, thermo-kwụsie ike na cryogenic onwunwe, elu ike na elongation na nwere àgwà nke ịka nká iguzogide, na-ọtụtụ-eji maka waterproof na-ewu ụlọ nke ụlọ ọrụ na obodo ewu, n'okpuru ala, ọwara, ọdọ artificial, wdg.