Suregrip, 1/2 Gallon, #120 Activator For Pre-Pasted Wallcovering, Hang Pre-Pasted Wallpaper & Borders Easily & Effectively, Prepares All Pre Pasted Wallpaper & Borders For Hanging Over Painted Or Primed Surfaces & Properly Conditions Them With Without Over Wetting Or Causing Tears, Non Staining, Easy Water Cleanup, Hangs 2-3 Double Rolls Or 150 SQFT.