Polyester Enclosures

Polyester enclosures are non-metallic electrical enclosures designed to protect electronic components, controls, and instrumentation from harsh environmental conditions. Manufactured from durable synthetic polymer materials, these enclosures offer excellent resistance to moisture, dust, corrosion, and chemical exposure. RSP Supply carries a full line of polyester enclosures from trusted manufacturers such as Hoffman and Vynckier, available in a wide range of sizes and NEMA 4, 4X, 12, and 13 ratings.

Lightweight yet strong, polyester enclosures are well suited for both indoor and outdoor industrial applications. Their corrosion-resistant construction makes them ideal for environments where metal enclosures may degrade, including wastewater treatment facilities, food and beverage processing, chemical plants, and outdoor installations. Many polyester enclosures are designed to meet specific NEMA or IP ratings, ensuring reliable protection against dust ingress, water spray, washdown, and other environmental hazards. Fiberglass reinforced polyester (FRP) enclosures provide additional strength and rigidity by incorporating fiberglass into the polyester resin. This composite construction improves impact resistance, vibration tolerance, and temperature stability, making FRP enclosures a preferred choice for demanding applications such as marine environments, corrosive industrial settings, and areas subject to mechanical stress. Polyester enclosures can also be customized with cutouts, mounting options, and accessories to support specific application requirements.