Title: Don't worry so much about the lead.....
Product review: ... as long as you don't ingest it. Lead sheet by itself doesn't cause any health problems. It's only when you eat it or breathe particles released from grinding or cutting that cause an issue. As an acoustics engineer, we use lead sheet all the time as a means of adding mass damping to ductwork to reduce flow noise. It's cheap and can be formed to complex shapes pretty well. In a car, this stuff would be most effective in adding mass to large body panels (doors, trunk floors, etc.) to reduce the amount of external road noise getting into the car. All they've done here is package it in a convienent form with adhesive backing and added a hefty markup.
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