Lub luag haujlwm tseem ceeb ntawm topcoat yog ua kom zoo nkauj ntawm txheej txheej thiab txhim kho lub durability ntawm txheej. Nyob rau hauv cov xim pleev xim, topcoat yog siv los ua txheej txheej saum npoo, thiab ntau lub hnub-resistant xim pigments tau ntxiv los ua kom cov txheej muaj xim mos thiab ua kom zoo nkauj ntawm cov xim pleev xim. Tsis tas li ntawd, topcoat kuj muaj kev ua haujlwm ntawm kev txhim kho cov kav ntev ntawm cov txheej thiab tiv thaiv cov txheej hauv qab los ntawm ib puag ncig sab nraud. cov
Nyob rau hauv kev tsim kho, topcoat feem ntau yog siv nyob rau hauv waterproof thiab anti-corrosion tej yaam num ntawm lub tsev xws li ru tsev thiab hauv qab daus. Nws muaj qhov zoo adhesion, tensile lub zog thiab hydrolysis stability, thiab tuaj yeem tiv thaiv kom tsis txhob ya raws thiab tshuaj lom neeg corrosion. Topcoat muaj ntau yam kev siv, nrog rau cov cement mortar, tshiab thiab qub vaj tse thiab cov qauv, thiab cov dej tsis zoo thiab tiv thaiv corrosion ntawm cov dej-ntsej muag thiab cov dej tau txais.
