 A na - eji polishter polyester, nke nwere ezigbo silicone na enweghị ntụpọ, na - enwekwa nnukwu nguzogide abrasion corrosion acid, a na - ejikarị ya rụọ ọrụ ugbo, ụlọ ọrụ mmepụta ihe maka ịkwa akwa, imechi akpa akpa, dịka akpa shuga, -azụ akwụkwọ akwụkwọ, sandbags, akpa akwa, na ndị ọzọ. 