Zinsser Cover Stain Oil-based Stain Blocking Primer


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Zinsser® Cover Stain® Oil-Based Primer is an all purpose oil-based primer designed for interior or exterior applications where an oil-base primer is desired. Cover Stain provides excellent penetration and flexibility and has excellent adhesion and stain blocking properties. Cover-Stain has excellent adhesion to dense, glossy surfaces such as enamel paints and varnishes, paneling, laminates, and ceramic tile without the need for sanding or de-glossing.


  • Interior and exterior
  • Best exterior wood sealer
  • Blocks cedar & redwood bleed
  • Seals water, smoke & nicotine stains
  • Sticks to all surfaces without sanding
  • Dries in 1 hour


Cover-Stain is recommended for application on interior and exterior surfaces that have been damaged by fire, smoke or water. Interior surfaces include new or previously painted drywall, cured plaster and cement-based coatings, wood (including pine fir, cedar, redwood, and plywood), metal (including aluminum, iron, steel, and cooper), vinyl, PVC, masonry (including stucco, concrete block, poured concrete, and brick). Exterior surfaces include new or previously painted wood (including pine, fir, cedar, redwood, and pressure-treated wood), hardboard, metal (including aluminum, iron, steel, and copper), vinyl and PVC.