Zinsser DIF Wallpaper Stripper Gel, 1 Gallon is a ready-to-use wallpaper remover designed with a gel formula that clings to vertical surfaces and stays wet longer for effective removal. This low odor, enzyme-based solution works by loosening difficult wallcoverings and adhesives without relying on harsh chemicals. It is effective on all types of wallcoverings and starch-based adhesives, penetrating deeply to soften wallpaper and any residual paste. The gel can be applied using a trigger spray bottle, brush, or roller and typically requires 15 to 20 minutes to work, though tougher areas may need additional time or a second application. After wallpaper removal, applying a thin layer of DIF Gel helps eliminate any leftover adhesive, which can then be rinsed away with a sponge and clean water. The gallon size covers approximately 200 to 300 square feet, making it suitable for larger projects. This no-drip gel formula a convenient and efficient solution for wallpaper removal with minimal odor and mess. Model Number: 2431