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Yes, staining or sealing a cedar deck or fence is highly recommended to extend its lifespan, typically by five to 10 years. While cedar is naturally resistant to mold and mildew, it can still fall victim to moisture, sun exposure, and rot over time. Applying a treatment creates a protective shield that helps prevent splintering, fading, and decay, preserving the wood's strength and appearance. A combination stain and sealer often provides the best protection, as it soaks into the wood grain rather than just sitting on top. This offers superior defense against UV damage and rot and lasts longer than a sealer alone. To maintain the wood's natural look, consider using a near-translucent stain. You should plan to reapply the stain or sealer every two to three years.

Waterproof paint creates a barrier to hold back moisture, but it doesn’t eliminate the source of the water. If you hire a basement waterproofing contractor, many will tell you that waterproof paint is only a temporary solution. On average, you can expect it to last from six months to two years in a wet basement before deteriorating.

Apply a wood stain or sealant to properly maintain a wood deck railing and keep it looking new. Sealants protect wood from moisture and weathering. Regularly inspect the railing for loose screws, damaged balusters, and other signs of wear to make timely repairs. Routinely clean the railing using mild soap, water, and a soft bristle brush.

Wood stain does go bad, but it will last in the can for between three and six years, provided you use proper storage techniques. Storing wood stain in open containers or in extremely low or high temperatures will cause your wood stain to become unusable much more quickly. Water- and latex-based wood stains typically last for just two to four years, while oil-based wood stains can last for three to six years.