How to Secure a Broken Fog Light Mounting Boss


Fog light mounting bosses are common in Kia
and Hyundai bumpers. When one breaks, it can be hard to fix using
normal methods. In this video, we will show you how to secure
a broken mounting boss so it will be just as strong as before. These Kia fog light bosses have very thin
plastic on the sides. Normally we would nitrogen weld the boss back
on, but this would be very difficult to do because the plastic here is so thin. So we will do the repair using an airless
plastic welder and 2045 stainless steel wire mesh. First, cut two small rectangular pieces of
stainless steel mesh. They should be roughly the same size. Take a screwdriver and bend the pieces of
mesh at a ninety-degree angle. Line up the mesh against the bottom of the boss. The mesh should be aligned so that the mesh
is sticking out beside the boss, and not pointing toward the inside of the boss. Use an airless welder to heat the mesh and
the plastic under the mesh. Use a screwdriver or other tool to push the
mesh into the melted plastic. Repeat this process on the other side. Both sides should now have mesh attached. This mesh will be used to anchor the boss
into the bumper. Sand the area where the boss will be placed to remove the paint, making sure to not sand off the position lines. Align your boss to the proper position. Use the airless welder to melt the mesh and
the plastic under the mesh. Use a screwdriver to press the mesh into the
melted plastic. Repeat this process on the other side. Melt some FiberFlex rod and place it on top
of the mesh. Smooth it into the bumper. Continue laying down FiberFlex until the mesh
is covered. It is best to work in small sections instead
of using a lot of rod at one time. Cover the mesh on the other side using the same method: just melt the FiberFlex and smooth it over the mesh into the plastic. Allow the FiberFlex to cool naturally, or
force cool with compressed air. We pulled on this boss to test the strength. It’s plenty strong to hold the fog light in position. Polyvance has been focused on plastic repair
and refinishing since 1981. Because of this focus, we know our products
very well. When our customers use our products and repair
methods, they can feel comfortable knowing they are backed by the years of experience
of our plastic repair experts. Thanks for watching, and make sure you subscribe to our channel and hit the bell to be notified when we post a new video. Let us know in the comments what you thought
of this repair, and check out our other videos for more plastic repair tutorials.

11 thoughts on “How to Secure a Broken Fog Light Mounting Boss

  1. .. This is so great job.. I would use the common super glue or the hot silicon but this is away better.. thanks

  2. I love this channel. Every video is great. The mesh is such a great idea. I never liked the staples some people use, dont see staples holding up. Is this procedure the same as broken headlight plastic tabs? I know they aren't as flat.

  3. where can I find a mounting boss piece? My fog light cover completely fell off on the highway after some piece of metal came off a truck and hit my car. I was able to purchase the fog light cover, but it did not come with the mounting boss's and I don't know how to repair it.

  4. Visit this video page on our website to see the full list of products used and other helpful tips: https://www.polyvance.com/video/fiberflex/how-to-secure-a-broken-fog-light-mounting-boss

  5. will a regular car mechanic do this? or the Hyundai dealership? i wish i can do this myself!!

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