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Message: <blockquote data-quote="FoxPro5" data-source="post: 5248660" data-attributes="member: 562649">Rudeboy (Don from the SDS) has been doing his own quasi-scientific testing and he feels a foil-backed deadener like DP is superior to a product without the foil constraining layer. IIRC, he's also found as little at 25% coverage can have a significant difference in vibration reduction.Depending on who you ask, it can vary from 60-80% coverage is as good as 100%. This depends on the location, shape and how badly the substrate is vibrating.One thing is for sure, large flat panels need vibration treatment the most...espcially right in the middle. Take care of those in your car, and you're doing pretty well. The overkill approach acts like an insurance policy, but it might cost you extra time and money.</blockquote>

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