2

I have a spiderweb crack on my windshield. While I didn't see what caused it, I suspect it was an acorn as there were no cars ahead of me or behind me for at least a mile and the weather was warm.

When the crack first formed it splayed out in 8 directions, but the top and bottom weren't very noticeable. By the time I arrived where I was going those cracks were gone leaving 6. The next day two more disappeared, the diagonal cracks on the left side leaving almost a bird foot looking pattern about 4cm long.

I'm getting the windshield replaced today so I won't be able to continue observing is progress, but what could cause this phenomenon?

Did water from some light drizzle or humidity get in the crack to make it hard to see? I would think water would have a different angle of refraction.

Could auto glass under enough pressure fuse back together? I don't have enough knowledge of auto glass but I've never heard of this and I've always heard the opposite; that a cracked windshield could shatter suddenly, not heal.

Did the cracks just align just right to disappear? This seems the most likely, but I hesitate on this because neighboring cracks did not align.

Chthonic One
  • 121
  • 1

1 Answers1

1

Bottom line is, cracks do not go away. They are still there, whether you can see them or not. What may have happened is the window shifted enough that the gap closed enough where you aren't seeing them anymore. So, in a sense, they have disappeared technically (meaning you can no longer see them), but in actuality, they have not gone away. It is the only explanation I can give you to account for what you're seeing.

Pᴀᴜʟsᴛᴇʀ2
  • 165,084
  • 32
  • 259
  • 508