Wheel wells sound deadening...

90210

2012 CR Mazda5 Touring
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2012 Mazda5 Touring
White/White, Aero wheels, Dual Motor Performance AWD, Enhanced AP
 
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2008 Mazda5 GT
Just did the front wheel wells only and already feel the difference, I can hear 1/2 of the noise reduced from the interior footwell. The front doors already have the same material, so most of the interior noise I can hear is from the engine behind the firewall and the windows. Now my car feels like a Mercedes lol

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Just a though, is that white foam stuff water repellent? If it soaks up water, it'll get heavy and sag the liner (not to mention hard to dry). Any concerns with the external stick on material collecting water?