... , it will trun blue. After dry, it will be no color 2.Strong viscosity Wallpaper adhesive- blue color, you can see the glue ... mix with cold water, it will be turn blue, after dry, it will be no color2.Excellent stickness, prevent lifting edge ... and metal wallpaper etc.Usage: It requires wall neat clean, dry, no solid, no hole, strong and no dust. First put ...