Lejell-223 yog ib qho dej noo kho tau polyurethane sealant.Nws muaj kev sib txuas zoo thiab kev sib khi zoo.Tsis muaj corrosion thiab muaj kuab paug rau substrates, ib puag ncig tus phooj ywg, tsis muaj npuas thaum siv, du thiab zoo tsos thiab lwm yam.