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Had anyone else noticed this purple colored substance near various seams and parts on the underbody of the Cruze? It looks like a type of paste or thick fluid, but upon touching it I found it to be very hard to the touch. Is this something GM
has sprayed up inside of the hollow parts of the underbody and between seams as a form of rust protection? What exactly is it?



In this image, if you look to the left and right sides across from the exhaust pipe flange, you will see this substance seeping out of the seams of that portion of the underbody.
 

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Overlapping panels use a combination of spot welds and a weld through adhesive called panel bond......I think that is what you see and it becomes hard.
Same product is used to hold the door skins to the frames.....spot welding in that area hasn't been used for several years.
Any time a panel in spot welded during construction or panels are mated, panel bond is used to seal the weld from moisture.
This because once metal is heated (as in a spot weld) it has a high propensity for corrosion at the spot.....this eliminates the concern.

Rob
 

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Looks like an Ultra Racing Lower front 4 pt chassis brace.
 
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