Lathem''s encapsulated coils are covered with DuPont''s ZYTEL 70G33L resin, a glass reinforced nylon. By using encapsulated coil motors, the Lathem time recorders have a superior resistance to moisture (15% greater dielectric strength*) and power surges. The encapsulation process also produces stronger lead wires which reduces the chances that the wires will pull out of the motor (double the pull-out strength*). The compact Lathem motors are permanently lubricated and require no maintenance during their lifetime. * Compared to standard tape wrapped coils.