Recommended For Stains on interior drywall, plaster, wood, masonry, acoustical tile, painted surfaces and wallpaper. Use over water stains, tannin, smoke, rust stains, pencil, ink, nicotine, coffee stains, etc. Seals soot and smoke stains on fire damaged walls. Can be used to spot prime exterior wood, shingles, and composition siding. Ideal for use in offices, schools, residences and other areas where quick drying and lower odor levels are desired.