This product is an excellent cleaner for exterior vinyl, aluminum, fiberglass, and concrete surfaces. Unlike chlorine bleach based cleaners, Marine Seal Wood Cleaner is biodegradable and will not harm wood fibers, grass, plants, or marine life.
Marine Seal Wood Cleaner removes dirt, grime, mildew stains, previous coatings (not paint), and weathered graying from horizontal and vertical wood surfaces. This product is recommended for surface preparation prior to application or reapplication of clear finishes and stains (for best results use Marine Seal Wood Dock Stain).
Note: Marine Seal Wood Cleaner will darken redwood and some types of cedar. Apply cleaner in a test area to ensure proper results prior to proceeding on the entire project.