Flood OneCoat Waterproofing Finish provides an advanced 1 coat protection against moisture and sun damage. Flood OneCoat Waterproofing Finish is a translucent wood finish that’s designed to restore the rich, warm appearance of natural wood. Premium penetration offers longer-lasting protection and provides a mildew-resistant finish that resists cracking, peeling and flaking. The simplicity of Flood’s OneCoat Waterproofing Finish allows you to complete your project sooner.