you will know by the smell. Asphalt based stuff smells a hell of alot worse than the butyl. When I got my B-Quiet Ultimate, it was really sticky. Ime sure you have the right stuff. Did you order from Ebay or the distributor?

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I love the smell of fiberglass in the morning!!

'07 Jeep Grand Cherokee Laredo
-1x MTX 9500 12"
-1x Alpine PDX 1.1000
-1x Pioneer DEH-P7800MP
-100 Sq Ft B-Quiet Ultimate

'00 Civic
-2x Alpine Type X 10"
-1x MTX TA81001
-1x Pioneer DEH-P6800MP
-100 Sq Ft B-Quiet Ultimate