Sound proofing the Dart

Riddler said

Peel and seal is an asphalt product. It'll smell if tar or drip if it gets hot enough.

Riddler

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I did the floor pans of my Jeep with it a couple years ago. Not much smell, and it has never dripped. The floor of a car isn't likely to get any hotter than a roof in the sun. Foil tape the seams.