Sealer White is a type of paint primer that is used as a preparatory coating to create a smooth and uniform surface for the application of topcoat paint. It is typically used on porous surfaces, such as drywall, plaster, and wood, to seal the surface, prevent the absorption of paint, and ensure proper adhesion of the topcoat. Sealer White can also be used to cover stains, smoke damage, and other surface imperfections. It is available in a range of formulations, including water-based and oil-based, and can be tinted to match the color of the topcoat paint. Sealer White is generally applied with a brush or roller and dries quickly, allowing for the application of the topcoat paint within a relatively short period of time. Its use can help to improve the overall appearance and longevity of the finished paint job.