Polyurethane sealers are protective coatings used to enhance the durability and appearance of various surfaces, including wood, concrete, and metal. They create a strong, flexible barrier that resists moisture, chemicals, and abrasion, making them ideal for both indoor and outdoor applications. These sealers come in different finishes, such as matte, satin, and gloss, allowing users to choose the desired look for their projects. Applying polyurethane sealers is relatively straightforward, often requiring minimal preparation. They can be brushed, rolled, or sprayed onto surfaces, and typically dry quickly, allowing for multiple coats in a single day. Proper application ensures long-lasting protection and enhances the longevity of the underlying material.