It happens to almost every driver at some point. You back up a little too far in a tight parking spot, or a small rock flies up from the road, and suddenly you notice a small crack on your car’s red tail light housing. While a cracked tail light lens might seem like a minor cosmetic flaw that you can ignore, delaying the repair can lead to much bigger electrical headaches down the road.

The main job of the plastic tail light housing is to seal the internal electrical components from external elements. When a crack appears, rainwater, car wash soap, and moisture will easily seep inside. This moisture causes the light bulbs to explode from sudden temperature changes and rusts the metal socket pins. Here is a simple guide on how to temporarily or permanently fix a cracked tail light lens at home.

1. The Temporary Fix: Heavy-Duty Lens Repair Tape

If you are short on time or waiting for a replacement part to arrive in the mail, you must seal the crack immediately to block out water.

• The Process: Clean the cracked area thoroughly with rubbing alcohol and a microfiber cloth to remove all wax, grease, and dirt. Buy a roll of specialized red tail light repair tape from an auto parts store. Measure the crack and cut a piece of tape slightly larger than the damage. Press it down firmly, smoothing out any air bubbles from the center outward. This tape is moisture-resistant and will keep the interior bone dry for a few weeks.

2. The Semi-Permanent Fix: Clear Epoxies or Resin Kits

For a cleaner, more durable look that doesn’t involve ugly tape lines, you can use a liquid plastic repair kit.

• The Process: After cleaning the dry surface, apply automotive painter’s tape around the outer edges of the crack to protect the surrounding plastic lens. Carefully mix the two-part clear or red epoxy resin according to the kit instructions. Using a small plastic syringe or applicator tool, gently drip the fluid resin directly into the crack until it is completely filled and level with the lens surface. Let it cure for 24 hours, then lightly sand down any rough edges with 2000-grit ultra-fine sandpaper for a smooth finish.

If the crack is massive or parts of the red plastic are completely missing, your best and safest choice is to buy a whole new tail light assembly unit online and swap it out entirely.