Weather-Bos™ Reduces These Stains:

• Tannin Stains: Stabilizes natural occurring tannin compounds which are in a large part responsible for the beauty, stability and durability of all wood. Tannin stains occur around pressure points such as nails, strapping marks or where water is able to penetrate the surface.
• Iron Stains: These stains are caused from a chemical reaction between the natural occurring extractives and iron. Iron stains are an inky blue-black color with a distribution dependent upon the type of iron exposure. The color is more intense on redwood, cedar and pine, but can occur on any wood.
• Bluestain: Reduces bluestain, which is biological in origin with the fungi feeding primarily on starch stored in the ray cells of the sapwood. The bluestain mold is caused by pigment in the mold strands or hyphae and can develop not only on damp wood but also on wood that was once dried.
• Brownstain: This is a biochemical stain, which appears during drying and is a result of prior enzyme activity during the storage or processing of logs for log homes prior to assembly. Pre-staining prior to this procedures prevents this occurrence.
• Mildew: Gray to black discoloration is usually caused by the spores of a superficial mold growth. In early stages, it appears as black dots at the original infection sites with a lighter gray fan spreading below. Mildew can colonize on almost any surface not cleaned and maintained on a regular basis.
• Resin Stains: This is the bleeding from the natural migration of resin or pitch which appears on the surface as beads of clear or colored resin exudate. This is limited to wood dried at temperatures too low to evaporate lighter components of the pitch, and is common in resinous species around wound areas. Resin or pitch bleeding occurs on surfaces warmed by sunlight or other sources of heat.