What are the best application techniques for ensuring the durability and longevity of a project when using latex paint sealer?

The best application techniques for ensuring durability and longevity when using latex paint sealer include properly preparing the surface, applying thin and even coats, allowing sufficient drying time between coats, and using high-quality brushes or rollers. Additionally, following the manufacturer's instructions and applying a topcoat for added protection can help enhance the longevity of the project.