Polyester Sealer

Polyester sealers are available in unsaturated polyester sealer, pre-accelerated polyester sealer, and low-styrene or styrene-free grades, depending on environmental and performance requirements. Typical applications include wood furniture, MDF panels, kitchen cabinets, doors, musical instruments, and decorative wooden products, as well as selected composite and engineered boards. The main ingredients generally include unsaturated polyester resins, styrene or alternative reactive diluents, fillers, flow modifiers, accelerators, and organic peroxide catalysts used during curing. Key advantages of polyester sealers are high solid content, excellent pore filling, rapid curing, good hardness development, and superior sandability, which significantly reduce production time in industrial finishing lines.

In terms of properties, polyester sealers offer high build per coat, low shrinkage, smooth surface leveling, and strong adhesion to wood and MDF substrates, making them ideal for high-quality finishing systems. They are compatible with polyester, polyurethane, and acrylic topcoats, providing flexibility for different coating systems. Polyester sealers are supplied in various industrial packaging formats, including metal cans, 12–25 kg buckets, 200–220 kg drums, and IBC containers for bulk users, meeting the needs of both small workshops and large-scale manufacturers.