That is a staple as said before. You can wait and maybe it won't protrude. But it is easy to fix yourself. A "X" cut of the EDPM, remove the staple, install a stainless screw (a little Dicor can't hurt), and cover the hole with Eternabond tape. I have done about 10 of these over the years.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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