PRO-935 R-35® Adhesion Promoting Wallcovering Primer PRO-935 R-35 is an adhesion promoting clear acrylic wallcovering primer. Ideal for non-porous surfaces, such as ceramic tile, formica, and glass. PRO-935 dries with a permanent tack, allowing for wallcovering to be installed over hard to adhere to sealed surfaces. Recommended Uses Ideal for difficult surfaces such as glass, tile, laminate and paneling Use when hanging wallcoverings with edge curl Key Features Dries with permanent tack, promoting wallpaper adhesion on sealed surfaces Dries clear Low odor, no splatter Easy water clean-up Water-based VOC (Regulatory): Zero ( As calculated per EPA Method 24 ) Coverage Approximately 350 – 450 square feet per gallon. Dry Time Minimum dry time is 3 hours. Optimum dry time is 12 hours. Low temperature, high humidity and poor ventilation will slow down the drying process.