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Message: <blockquote data-quote="Rudy" data-source="post: 6268302" data-attributes="member: 568035"><p>Asphalt is a very poor vibration damper. It is also much less stable than butyl. When it's fresh it melts at 185°F. This is actually a fairly easily reached temperature at the sheet metal of a car, in the sun, during the summer. What makes this worse is that asphalt is mixed with rubber compounds to stabilize it and raise its melting temperature to 180°F. Over time the rubber deteriorates and the materials heat tolerance drops steadily. After a year or two it can get low enough to melt at much lower temperatures. Might be worth the risk if the stuff worked well, but it doesn't - so why bother?</p></blockquote><p></p>

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