Introducing Diode Dynamics Butyl Headlight Sealant! This sealant rope was designed specifically for headlamps, with a firmer composition than auto-store windshield glue. This makes it easy to work with, without causing a sticky mess.
Use it to reseal any headlamp after installing Diode Dynamics LED products! Warm it up a bit, stretch it into the headlight channel, and clamp together while heating, making sure the lens is fastened to the housing. With a little practice, you'll have a factory-quality seal, with quality butyl that will protect against moisture ingress for years to come.