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Old 12-09-2016, 02:23 PM   #100 (permalink)
freebeard
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Tell us what we're looking at. My guess is that you taped black polyethylene, injected the foam behind it, and it expanded until the plastic ruptured. And you put tape over the first pinholes that opened up.

Close?

I've often thought of injecting foam into the door pillars and window headers in a VW Beetle body (plus one bar across the center roof) to make a non-NHRA/NORRA/SCTA-legal roll cage.

What do you think is the future history of the repair? Delaminates and traps water? Outlasts the pyramids?
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