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General Finishes Stain Blocker

Stain Blocker is General Finishes's new water based white primer. It can be used to protect pigmented finishes from stain, dye and wood tannin bleed-through. Use over an existing finish, raw wood, or MDF particle board as a base coat for General Finishes milk paints, chalk style paints and pigmented polys. Apply with a brush or sprayer. Typically used with snow white or antique white milk paint and may not be needed when painting with darker colors. Do not mix with any paint stain or topcoat as contamination from other finishes will cause product failure. Easy cleanup, rinse all brushes and equipment with clean water.

California Prop 65 Warning

  • Brush or spray application
  • Before use clean and remove grime grease or loose paint
  • Sand with wood grain. Prep sand with #120 then #220 grit paper - remove dust It is essential to apply 2 coats. The first coat will absorb contaminants in the wood, causing a color change during the first application and the second will seal them
  • Coverage: 600 Ft./gallon 14.76 m/liter
  • Dry: Tack free 10-15 minutes
  • Ready to sand in 1-2 hours
  • Existing Finish: Recoat in 3-5 hours
  • Raw wood: Recoat in 2-3 hours
  • WARNING: DO NOT MIX with any paint, stain or topcoat. Contamination from other finishes will cause product failure. Rinse all brushes/equipment with clean water. Do not use General Finishes Brush & Gun Cleaner
Grouped product items
Item NumberDescriptionColorUnit of MeasureBase PriceVolume PriceQty


General Finishes Stain Blocker Quart
Volume Pricing
  • Buy 8 for $37.55 each and save 4%


General Finishes Stain Blocker Gallon
Volume Pricing
  • Buy 4 for $93.23 each and save 3%
Shipping : All orders are shipped in 24 business hours

Product Specifications

General Finishes
White Primer
Water Based Milk Paint
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