ROMAN PRO-909 Vinyl Prep Clear Wallpaper Primer is an acrylic wallcovering primer for general purpose applications, such as over sound, latex painted surfaces. This primer is a low odor, no splatter primer that works excellent on dry wall. For new, unsealed drywall, PRO-977 is recommended. This can be ready to hang over after approximately 3 hours dry time and dries clear. Avoid freezing; store upright in a dry and cool place. All ROMAN products contain biocides for in-can preservation. Each order contains 1-gallon of PRO-909 that covers approximately 550 square feet and comes with a 1-year limited warranty. Providing quality products for over 75 years, ROMAN's brands are rated number one by professional wallpaper installers. Known as the leader in the industry, ROMAN was the first to introduce pre-mixed wallcovering adhesives, wallcovering primers, and many other innovative products in the wallcovering industry that is a standard on store shelves today.