tannin wood staining

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Description

Brownish discoloration that will come through prime/finish coats unless properly primed.

 

 

 

 

Probable Cause

• Tannin escaping moisture and primers that don’t block staining.

• The brownish stains are likely to come from redwood, cedar, mahogany and knots without priming.

• Severe staining may require more than 1 primer coat.

• Staining is more visible on light colors.

 

Solutions

• Locate and correct moisture sources.

• Wash with a commercial grade bleach solution, rinse thoroughly and allow to dry 48 hours minimum.

• Severe staining needs 2 coasts or more of a stain-blocking primer.

• Cedar and redwood always require a stain-blocking primer.

 

Primers & Interior Finishes

• Priming is critical. Stain will bleed through multiple top coats without proper priming.

• Select a top quality California Paints exterior paint in the color and sheen of your choice.

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