Primer to Block and Stop Tannin Bleed — Causes, Checks & Fixes
Introduction Tannin bleed is the staining that happens when natural wood tannins leach into concrete or masonry. Moisture movement and warm weather can drive those tannins to the surface. Fixes typically involve stopping the moisture and applying a suitable primer before repainting. First, check for sources of moisture and look for spots that show staining […]
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