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Mar 30, 2021
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Superglue and Soda: Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

I decided to fix the cracks on the plastic panel of my well-worn truck using the technology I saw in the videos on YouTube. It is based on the interaction of ethyl cyanoacrylate glue (any superglue from the store) and an alkaline compound (soda). Mixing these components gives a polymerization reaction. The reaction occurs almost instantly, creating a strong connection of the elements in a matter of seconds. The seam resembles hard plastic. Isn’t it “cold welding”?

It took:

  • Super glue;
  • soda;
  • degreaser.

Superglue and Soda Cold Welding Automotive Plastic

In the nearest chain store I bought two tubes of the cheapest universal second glue at 35 rubles apiece. In the pharmacy, I got hold of alcohol lotion to degrease the parts to be glued and a pair of gloves to protect my hands.

Progress

The plastic panel is removed from the part of the cab where the feet of the passengers are. I do not know what the passengers of the previous car owners did, but the panel is in a very poor condition. I still can’t find an inexpensive replacement, so I’m fixing it myself. In the photo, along the white seams, you can see about the partially done work to remove the cracks.

Superglue and Soda Cold Welding Automotive Plastic

I work further:

1. Degrease the crack with alcohol on both sides of the part being repaired. For this, it is convenient to use an art brush (borrowed from a child).

Superglue and Soda Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

2. I put a thick strip of glue inside the crack.

Superglue and Soda Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

The sides of the fault are tightly pressed together.

3. Along the crack on the front side, I ran another strip of glue and sprinkled abundantly with soda, lightly trampling it into the glue with my fingers, and brushed off the excess.

Superglue and Soda Cold Welding Automotive Plastic

I did the same on the inside of the panel.

Superglue and Soda Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

It turned out to be a strong, rigid seam.

Superglue and Soda Cold Welding Automotive Plastic

In photo 12, the plastic panel looks like a cave wall with a primitive pattern, so badly it was damaged. With the help of glue and soda, it was also possible to securely attach a broken piece of plastic and solder the two parts of the handle like cold welding.

Superglue and Soda Cold Welding Automotive Plastic

Superglue and Soda Cold Welding Automotive Plastic

Now the plans are to grind the seams with sandpaper and paint the part with dark gray paint for plastic. It will be a different story, but I am no longer looking for a replacement during the showdown.

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