DIY Frequently Asked Questions / Wood Preservatives Waterproofers')">
Water repellents minimize water damage on pressure-treated and untreated wood. Some also contain a mildewcide to control mold and mildew. Use water repellent formulated for immediate application to pressure-treated wood to avoid premature cracking, splitting, splintering and warping. Periodic re-applications help prevent water damage as wood ages.
Wood preservatives by themselves provide no protection against moisture or water. Water repellency must be formulated into the product. Mildewcides are also frequently formulated into preservatives.
Water-borne, water-repellent preservatives for wood offer lower environmental hazards and convenient water cleanup. They provide an alternative to conventional solvent-based, water-repellent preservatives while retaining effectiveness, rapid drying qualities and excellent paintability.
Wood toners are water repellents that add color to highlight wood grain. Although toners are not to be used as if they are stains, adding color to a water repellent gives wood the benefit of ultraviolet light protection.
Most toners on the market are designed for use on pressure-treated wood. Some repellents contain ingredients that cause water to bead.
Specialty waterproofers include a multi-surface formula that can be used on brick and concrete, an aerosol version that works well for small exterior projects, a fence protector, a leather and fabric protector and a sport waterproofer specially designed for use on outdoor fabric and sporting equipment.