Sealers are substances used to protect surfaces from moisture, stains, and damage. They create a barrier that prevents water and other liquids from penetrating materials like wood, concrete, and stone. Common types of sealers include water-based sealers, oil-based sealers, and epoxy sealers, each suited for different applications and surfaces. In construction and home improvement, sealers are essential for maintaining the longevity of materials. They are often applied to driveways, patios, and countertops to enhance durability and appearance. Regular maintenance with sealers can help prevent costly repairs and extend the life of various surfaces.