ECOS Interior Universal Primer | Stain Blocking Primer | ECOS Paints
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  • Universal Primer

Universal Primer

    Universal Primer is the strongest bonding primer for use on almost any surface. Very effective at covering difficult stains. As with all ECOS paints and other products, this primer is water based, water-based, non-toxic, and VOC-free....More Details

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    • Application Instructions
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  • Product Code: 700355463870
  • Availability: In Stock

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$34.95 / Each
$75.95 / Each
$349.95 / Each
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This water-based, solvent-free stain-block primer is highly effective and has a number of uses for concealing and blocking out difficult stains such as tannin staining from hardwoods such as oak and mahogany, water staining on (for example) plaster walls & ceilings, and many other "difficult to get rid of" stains. However, this product will not block oily or tarry stains, such as those from coal fires (chimney breast) or asphalt.
NOTE: Not ideal for exterior bare cast iron - ask for advice.

  • ✔ Zero VOC1
  • ✔ Non-Toxic2


  • 1Conforms to CDPH 01350 (VOC emissions test taken at 14 days).
  • 2Conforms to ASTMD-4236, specifically concerning oral toxicity, skin irritation and respiratory effects.

Universal Primer

Typical coverage per gallon:
400 sq. ft.
Recommended coats:

Add all surfaces to be painted then remove openings, like doors and windows

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Product Label
Preparation Surfaces should be clean, dry, sound, and free from dirt, dust, grease, and loose or flaking material. Clean stubborn areas with mild detergent. Rinse and dry thoroughly before painting. Soft or crumbly substrates should be pre-treated.
Application and Clean Up Under most conditions thinning is not necessary. Stir gently before and during use. Intermix if using multiple containers to ensure color uniformity. Generally only requires one coat. Sand lightly between coats as this product may raise the grain of the wood. Normally dries to the touch in one hour. Allow four hours before sanding or painting. Can be applied using a good quality synthetic brush; or rolled using a shed resistant 1/4"-3/8" roller cover. Avoid applying below 50oF.
Coverage 400 sq. ft. per gallon (average, but depends on the porosity of the substrate)
Recommended coats 1
Product Code 700355463870