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Exclusive 12 Series Compatibility: Engineered as an exact-fit replacement sealing gasket for Signal-Stat and Truck-Lite Model 12 series round marker clearance light housings, including 1201, 1203, and 1204 lamp assemblies.
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Heavy-Duty Environmental Shield: Establishes a weather-tight seal that prevents corrosive moisture, humidity, and road grime from penetrating internal electrical components.
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Premium Elastomeric Rubber: Molded from premium-grade, high-elasticity black rubber built for long-term compression recovery and excellent UV resistance.
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Direct Industry Cross-References: Designed as a seamless direct interchange for popular fleet parts, replacing original industry number 99054R/Y, Grote 94110, and NAPA LIT 9180.
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1-Year Manufacturer Warranty: Backed by Truck-Lite's trusted 1-Year limited warranty against defects in materials and craftsmanship.
Truck-Lite 9180 – Signal-Stat 2.5 in. Round Black Rubber Sealing O-Ring for 12 Series Marker Clearance Lights
Prevent costly electrical damage and maintain full DOT/SAE safety compliance with the heavy-duty Truck-Lite 9180 Signal-Stat Black Rubber Sealing O-Ring. Specially engineered to original equipment (OE) manufacturing specifications, this premium replacement round gasket provides an absolute, pressurized environmental barrier that safeguards your vehicle's critical marker clearance assemblies against water ingress and road contamination.
Marker clearance lights on heavy-duty commercial fleets, utility trucks, and long-haul trailers are constantly exposed to brutal road conditions. The Truck-Lite 9180 is molded from high-grade industrial rubber formulated to resist cracking, dry rot, and thermal weathering under extreme temperatures. Its precision-engineered circular profile compresses tightly under snap-on lenses, locking out rain, high-pressure fleet washes, road salt spray, and fine dust. By keeping your internal bulb sockets, pigtails, and wire connections bone-dry, this simple O-ring eliminates electrical corrosion and random short circuits. Designed for rapid, tool-free replacement, it allows owner-operators and fleet mechanics to complete maintenance in seconds, minimizing shop downtime.