Before you apply any type of coating to logs, the surface must be clean and free of any dust, debris, unsound surface wood or mill glaze. A typical log surface is coated with "mill glaze". A typical log surface of wood when leftover tree resins and sugars react to the mechanical and heat energy from the milling process. This layer of glaze can be almost impenetrable to stains. It must be removed before good penetration and adhesion can occur. The best overall cleaning method is corncob or glass media blasting. Sashco's sodium percarbonate cleaner, CPR, can work well for this important step. The best methods for removal are corncob or glass media blasting, direct sanding or aggressively power-washing logs with high pressure water. These processes will not only remove the surface glaze, but will also help roughen the surface for a better coating bond.
This can be purchased on our I-Wood-Care online store under cleaners.
Products: CPR Log Cleaner & Brightener