A water-based sealer is a protective coating used to enhance and preserve various surfaces, such as wood, concrete, and masonry. Unlike solvent-based sealers, water-based options use water as the primary solvent, making them more environmentally friendly and easier to clean up. They provide a clear finish that helps to repel moisture, dirt, and stains, extending the life of the material beneath. These sealers are popular for both indoor and outdoor applications due to their low odor and quick drying times. They are available in different formulations, including those that offer UV protection, making them suitable for surfaces exposed to sunlight.