Shi ne wani muhimmin ɓangare na tsakiyar iska mai sanyaya ƙarshen na'urar, shi ya dace da tsakiyar iska mai sanyaya don aikin raba soda. Waterproofing shine muhimmin sassa na haɗin iska mai sanyaya, wanda za a iya amfani da shi a ƙananan saurin iska. Za a iya amfani da gilashi karfe kayan ko PVC kayan, tare da kananan juriya, haske nauyi, high karfi, juriya lalata, juriya tsufa, ruwa rabuwa da kyau sakamako, tsaftacewa mai sauki, m halaye. PVC baƙin da aka fi amfani da PVC resin, kiyaye baƙin ya dace da rigidity, juriya, juriya tsufa, juriya lalata wuta da sauran amfanin. Ci gaba extrusion gyara, nasarar kiyaye yawan baƙi da kuma daidai geometry size, za a iya ƙayyade wani baƙi tsawon. PVC shimfidar ruwa na iya ci gaba da aiki a cikin yanayin 90 ℃ - 25 ℃.