Zinsser® Drywall Pro 2-in-1 seals residual wallpaper adhesive and texture coatings, forming a water-resistant barrier that prevents water in topcoat primer or paint from affecting the surface. In addition Zinsser® Drywall Pro 2-in-1 prevents bubbles that form when damaged dry wall is skim coated with filler or joint compound. It penetrates and seals damaged facing paper, restoring it to a sound surface for repairs, suitable for painting or wallcovering. New gypsum drywall, joint compound and filler are very porous and can make finishes and coatings appear uneven. Zinsser® Drywall Pro 2-in-1 penetrates and uniformly seals these surfaces, creating a moisture resistant film that also protects drywall from blistering, tearing and other damage when redecorating in the future.