... .well-sealed one-component ; 3.polyurethane building seala construction adhesive CS-a4 is a kind of high-powered,elastic after cured,well-sealed ... flooring,ceramics sealing and decration,the same for other building walls,access panle.Construction attentions:1.Carefully check relative identifier of sealants ... immediately if you hand or skin gum on,not solvents. high quality PU construction adhesive