A sealed electrical connector system has a first connector assembly and a second connector assembly which are mated together at front ends thereof. In an embodiment, each assembly includes an insulative outer housing, shield seal cap, and terminal housing and an elastomeric shield seal and mat seal, each having terminal receiving passageways through which a terminal is seated. The shield seal caps are attached to rear ends and hold the shield seals in the outer housings. In an embodiment, the second connector assembly includes an insulative outer housing and an elastomeric seal, each having terminal receiving passageways through which a terminal is seated. The shield seal prevents high-pressure spray from directly contacting the mat seal.