Tannin Staining

Exterior Paint Solution

 
 

Tannin Staining: Brownish or tan discoloration on the paint surface due to migration of tannins from the substrate through the paint film. Typically occurs on "staining woods", such as redwood, cedar and mahogany, or over painted knots in certain other wood species.

Possible Causes:

Failure to adequately prime and seal the surface before applying the paint.

Use of a primer that is not sufficiently stain-resistant.

Excess moisture escaping through the exterior walls, which can carry the stain to the paint surface.

Solution:

Correct any possible sources of excess moisture
see Efflorescence and Mottling. After thoroughly cleaning the surface, apply a high quality stain-resistant oil-based or acrylic latex primer. Oil-based stain-resistant primers are the best type to use on severely staining boards. In extreme cases, a second coat of primer can be applied after the first has dried thoroughly. Finish with a top quality latex paint.

 

Interior Paint Problems

 

Exterior Paint Problems

Blistering

Burnishing

Blocking

Caulk Failures

Cracking - Flaking

Foaming - Cratering

Lapping

Mud Cracking

Mildew

Picture Framing

Poor Scrub Resistance

Poor Sheen Uniformity

Poor Stain Resistance

Poor Flow - Leveling

Poor Hiding

Roller Marks - Stipple

Roller Spattering

Sagging

Surfactant Leaching

Wrinkling

Yellowing

 

Alligatoring
Blistering

Chalk Run down
Chalking
Cracking Flaking

Dirt Pickup
Efflorescence - Mottling
Fading-Poor Color Retention
Frosting

Lapping

Mildew

Nailhead Rusting

Paint Incompatibility

Peeling
Poor Galvanized Metal Adhesion
Poor Alkali Resistance
Poor Gloss Retention

Surfactant Leaching

Tannin Staining

Vinyl Siding Warp

Wax Bleed

Wrinkling

 

 

 
 

 
 
 
 

| Site Map | Add Link Resources | Privacy Policy © 2016 PainterClick.com All Rights Reserved.