When you try to install a newly purchased brake light that leaves a giant gap, it will allow water to enter in. How annoying it is. Please don't worry, our products solve this problem very well, you don't have to worry about water leaking in. Yes, it comes with the gasket. 1pc Foam gasket included as a buffer cushion and ideal solution for the water leak problem, protect the LEDs and wiring inside from rain and snow. Application: For 1988-1998 Chevy Silverado For 1988-1998 Chevy C10 C/K 1500 2500 3500 Full Sized Truck For 1988-1998 GMC C/K 1500 2500 3500 Full Sized Truck For 1988-1998 GMC Sierra Specifics and Benefits: - An excellent replacement / accessory for your vehicle. - Provide an additional warning to the traffic behind you when braking. - Newest Technology 3rd Brake Light with LED for parking and brake light function Feature: 1. Plug And Play: No Rewiring, Just Plug Your Factory Harness Into our Tail Light And You are ready to Install. Simple, Quick, Easy. 2. Waterproof Design: This bake light case is padded with foam back and is perfectly sealed around. The foam gasket is designed for water-proof. prevent from dust, mud, snow or heavy rain. 3. High-quality materials: The third brake light is made of high quality OE comparable material to withstand rough road wear and the test of time. 4. Premium LED Technology: Advanced Leds Designed to Refresh Your Vehicle'S Appearance With A Visually Striking Presence. Package Includes: 1 * Chrome Housing Smoke Lens Third Brake Light Cargo light