Interior Products
Exterior Products
Small Projects
Concrete Products
Contractor Products
Search The Product Library
search now
Valspar® Stainblocking Primer
  • Best for blocking stains
  • Multi-purpose primer
  • Seals wood, masonry, metal and drywall
  • Blocks smoke, crayon, ink, grease and water stains
  • Low odor, low VOC
Valspar Stainblocking Primer is a white pigmented primer/sealer formulated for sealing surfaces and stains prior to topcoating. The water-base formula is low odor—an ideal feature for indoor uses.
Where To Use

Use primer indoors or outdoors to seal stains such as watermarks, smoke damage, surface burns, graffiti, lipstick, grease, rust stains, tannin bleed and mildew stains. Ideal for use over properly prepared wood, drywall, plaster, metal and masonry.

Paint Calculator
Preparing Your Surfaces

Clean and dry surface thoroughly. Scrub stained areas with an all-purpose cleaner to remove any residual stains. Remove all surface dirt, chalk and mildew. Tannin stained areas on wood do not need special surface preparations. For fire damaged areas, remove burned or severely charred areas to sound wood surface. Sand smooth. For mildew stains, this product will seal residual stains from old mildew, but will not resist active mildew growth. All active mildew must be removed from surfaces prior to application by scrubbing affected area with a commercial mildew remover or a solution of 1 part liquid chlorine bleach to 3 parts water. Rinse thoroughly. Wear protective goggles and rubber gloves to avoid chemical contact with skin or eyes.

Product Details
Select a Product Detail type and download the PDF.
SDS Information
Find your Safety Data Sheet information for your Valspar products.
find it now
Valspar Signature®
  • High-hiding Paint + Primer
  • ScuffShield™ Technology resists scuffs and stains
  • Remarkable coverage and smooth finish
  • Beautiful colors
  • Fade and mildew-resistant finish
  • Low odor, low VOC
  • 100% acrylic latex
  • Lifetime warranty
Learn More
Valspar Ultra™
  • Paint + Primer
  • Superior-quality color
  • Low odor, zero VOC†
  • Thick, one-coat coverage
  • Stain resistant and scrubbable
  • Gives mildew-resistant finish
  • 100% acrylic latex
  • Lifetime warranty
  • Available through Lowe's Special Order only
Learn More
Product Finder
We'll help you find what you need for your project.
Begin Searching
Locate a store
Retail Locator