SEAL MASTER CORPORATION Consultants & Designers Manufacturers of Inflatable Seals and Other Custom Rubber Products for Water Control Seal Master is at the forfront of developing custom-engineered, precision-built, fabric-reinforced elastomeric products for flood gates, water barriers, actuators, pipe plugs, containment systems and other water control applications. Engineers are quick to recognize their strength, versatility and environmental compatibility. Design assistance offered. Founded in 1974, the firm has designed and fabricated over 6,500 distinctly different elastomeric seal products. Today, counted among Seal Master's prestigious list of customers are many Fortune 500 companies.