Clear Silicone. Available anywhere. Even Wal-Mart.
While installing one of my rear subs, I accidentally ripped it around the edge. Ever since then it made an annoying vibrating "buzz" sound when on long bass chords.
A guy told me to put clear silicone on it and that would fix it. He was right. It patched it right up.
I love this fix! My best friend who I bought my subs off of thrw something in his trunk and punctured one of the subs.. He patched that baby right up and it works GREAT!!! Simply and eye sore to look at but eh whatever, ill get around to replacing it eventually...
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It's not about what you have under the hood, it's about who you have behind the wheel...