Identify the plastic type and confirm it is weldable
Clean the surfaces thoroughly
Remove paint, grease, dirt, and oxidation from the weld area
Dry the parts completely
Align and clamp the pieces in position
Select a matching plastic welding rod or filler material
Use the correct welding method for the plastic
Heat the joint and filler material evenly
Press the softened plastic together to fuse the parts
Move steadily along the seam
Maintain consistent heat and pressure
Fill gaps with additional material as needed
Allow the weld to cool naturally
Trim or sand excess material if required
Inspect the weld for cracks, voids, or weak spots
Test the repair before putting the part back into service