APM Hexseal was founded in 1947 with the mission to develop and manufacture environmental sealing solutions to protect and prolong the life of electromechanical switches and circuit breakers in hostile environmental conditions worldwide. This focused effort resulted in the development of our extensive line of sealing boots, that mate with the vast majority of switches, breakers, encoders, potentiometers & rotary devices found throughout the world today, as well as our sealing hardware, which includes a wide variety of self-sealing fasteners and sealing washers.