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APM Hexseal, established in 1947 by Milton Morse and Riva Solins Morse, specializes in innovative environmental sealing solutions designed to extend the life of electromechanical switches and circuit breakers. Initially developed for the U.S. Military during World War II, APM Hexseal’s original sealing switch “boot” protected electrical controls in harsh environments. This invention led to a full line of patented switch, potentiometer, and circuit breaker seals that operate reliably under extreme conditions.

APM Hexseal's products, including silicone sealing boots and reusable self-sealing fasteners and washers, are renowned for their durability and effectiveness. These products are extensively used in military, industrial, and commercial applications, offering IP66/68 ingress protection ratings and reliable performance across various environments. APM Hexseal's commitment to quality is evident in their rigorous testing and UL Recognition for many of their parts.

Today, APM Hexseal continues to lead the market with its robust sealing solutions, ensuring the protection and longevity of critical components in industries ranging from aerospace and defense to industrial automation and electronics.


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