If the plastic is cracked, then there is no need to immediately run to the store and buy a new part. Firstly, it can be very expensive (for example, a car bumper), and secondly, it cannot be found if it is a product from previous years of production. But it can be restored using available materials and tools.
Do-it-yourself restoration of cracked plastic part
We clean the plastic from dirt and dust. We return its parts to their original position using the elastic properties of the material.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-2.jpg)
We fix the damaged site on the front side with aluminum tape, gluing it along the cracks.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-3.jpg)
We embroider and grind from the inside of the crack with a suitable milling cutter and a grinding stone.
![](http://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-4.jpg)
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-5.jpg)
Remove the plastic shavings with a knife blade and wipe the damaged area with a clean napkin.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-6.jpg)
We replace the narrow soldering iron tip with a wide one and, softening the plastic along the cracks, we make transverse “stiffening ribs” that strengthen parts of the product on the sides of the cracks.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-7.jpg)
We bite off the ends of the cable ties and, filling the glue gun with them, fill the recesses along the cracks with molten plastic.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-8.jpg)
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-9.jpg)
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-10.jpg)
After it has cooled, we cut off the weld seams, sand it with sandpaper, and coat it with acrylic spray.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-11.jpg)
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-12.jpg)
We remove the aluminum tape from the front side and make sure that the damaged site has been restored and is almost invisible during visual inspection.
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-13.jpg)
![](https://building-diy.com/wp-content/uploads/2024/02/How-to-Repair-Plastic-Parts-Using-Cable-Ties-14.jpg)