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DIY Bumper Crack Repair

Here’s how to repair a crack in a plastic bumper.

Today we’re going to be fixing a cracked bumper cover so here on the back of the bumper cover you can see the crack goes down almost halfway through first i’m going to need to do is clean up this edge so you can take epochs for that i’m going to be using a rotary tool with a grinding bit what you really want to do is increase the surface area by grinding the

V-groove into the crack so that the epoxy holds i’m going to take a little bit of 40 grit sandpaper and rough up the area around the crack and next we can use a little bit of acetone or alcohol to clean the crack both on the inside and on the outside cleaning the inside here’s what the surface looks like after it’s been sanded and cleaned next i’m going to hold

A crack closed until it’s nice and flush and use a pair of locking pliers to clamp it at the top next i’m going to close the crack into place and use a little bit of tape to secure it so it’s nice and flush i got the crack covering the tape and it’s nice and flush here’s what the inside of the crack looks like once it’s nice and sealed up on the other side to fill

In this crack i’m going to be using some jb weld plastic bhandar it’s a two-part mixture that has a 15-minute setting time i’m going to mix up my epoxy and fill in the crack i’m also going to be using a little bit of drywall tape at the back here to make the connection a bit stronger all right so i’m just mixing the epoxy up here i’m going to scoop that and apply

It into the crack and put it in nice and smooth make sure it fills into the crack next i’m going to lay down some of this drywall tape to reinforce it a little bit better and then on top of the drywall tape i’m going to put another layer of epoxy just to hold it in there nice and alright so this is what the epoxy looks like with the drywall tape on top of the crack

We’re just going to let that sit overnight until it cures and we’ll come back in the morning and see how it looks alright so i’ve let that dry for about 12 hours and you can see the epoxy is nice and hard and you can remove the clamps alright next i’m going to remove the masking tape you can see what this crack looks like underneath you can see the crack is nice and

Smooth and almost flush at this point you can just put some touch-up paint on the crack or you can put some filler and spray paint over next i’m going to take a little bit of 320 grit sandpaper and rock off the edges around the crack there’s the body filler holds better i’m also going to sand any other places that need to be painted next i’m going to use a little

Bit of painting on a cloth and clean the area nice and well and just make setting up a set of bondo body filler here and then i’m going to lightly apply a thin layer to the crack all right once the body filler is dry i’m next going to sand it with some 80 grit sandpaper just most of the filler off i’m going to hit it with a little bit of 320 grit to smoothen it out

Sanding complete i’m next going to wipe it down with some paint thinner and make sure there’s no grease on any surface before we paint i’m going to prime the areas that are damaging on the buffer i’m gonna apply my second layer of primer rather the primer is dry next i’m going to wet sand it with some 400 grit sandpaper now that i finished wet sanding you want to

Wipe it down with a nice wet rag feed everything off the pink color you just want to put on a very light coat – the paint will run second coat here’s what the bumper looks like after it’s been painted it looks really nice and clean you can only see a small hairline where the crack once was but other than that it looks pretty good next we’re going to install the

Bumper onto the vehicle and here’s what everything looks like once its installed on the car why are we always left with extra fasteners after finishing a job like this

Transcribed from video
DIY Bumper Crack Repair By speedkar99