• Custom extruded and molded profiles

• Rubber-to-metal bonding

• Compression, bulb, and J-seal designs

• High-resilience materials

• Engineering support

A4 Industrial specializes in the design and production of custom-engineered lock and dam seals built to perform in demanding marine and waterway environments. Our seals are manufactured using durable elastomers and reinforced materials designed to withstand continuous exposure to water, UV, and extreme weather conditions. Each product is engineered for long-term performance, minimal maintenance, and precise fit to your specifications.

Our lock and dam seals are used in critical infrastructure applications, ensuring watertight reliability and efficient operation of gate systems. Whether for new construction, rehabilitation, or emergency replacement, we provide complete sealing solutions that meet or exceed U.S. Army Corps of Engineers standards.