This is an multi-purpose universal paste that can be used to hang unpasted wallpaper. You can also use it to doubly secure pre-pasted patterns. It comes as a powder that requires you to mix it with 2 gallons of water to create paste. One 8 oz package covers 650 sq. ft., Prepasted Wallpaper: 14-16 rolls; Lightweight Vinyl: 12-14 rolls, Medium Weight Vinyl: 10-12 rolls; Grasscloth: 8-10 rolls. Contains no toxic chemicals that are hazardous to health.