SHINE COAT " PS SEALER H500 " Polyester sealers are high performance coatings that are often used in woodworking and furniture finishing. They are known for their excellent filling properties, high transparency and durability. These sealers are particularly effective at filling the pores on wood surfaces, creating a smooth base for topcoats such as clear finishes or paints. Compared to nitrocellulose or polyurethane sealers, polyester sealers typically offer better filling capacity and durability.