Yes, waterproofing wood for the shower can be achieved by using sealers.
They’re usually a clear/transparent finish that goes on the outside of the wood. Sealants such as polyurethane, varnish, and lacquer give excellent waterproofing and can be used for showers.
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Most stain is applied with a brush, a roller, or spraying. The manufacturer's instructions will advise the best method to suit your chosen stain.
Your wood must be clean and dry. That means all dirt and residual paint should be removed by washing and scraping. If you want a smoother surface, you can sand the wood, which helps remove dirt and...
