... adhesion 2.Superior wet tack 3.Superior mildew resistance 4.PH neutral It is an excellent quality and high performance wallpaper ... starch based, eco-friendly;--Contains fungicide, offers superior mildew resistance;--PH neutral, without damage to the wallpaper;--Easy clean up, non ... Blue Wings name a cornerstone in the wallpaper adhesive industry. PH value neutral All-purpose wallpaper adhesive