Dynamat Hoodliner trouble....

[metroplexchl]

I just installed my Dynamat Hoodliner that I got in the mail. It sucks!

I've never used Dynamat Xtreme but have heard it's good stuff. I started with the hood liner because it looked super simple and required no removing of door panels, seats, carpeting, etc.

The directions are simple. Peel the protective layer off the back, put it under the hood, and then roll it on.

Main Problem - the sticky stuff completely blows. I am not remotely confident in this product. I cannot imagine how it's going to stay stuck to the underside of the hood. It doesn't say to clean the underside of the hood, but I washed and dried it extensively. Clean metal hood for it to stick to, but most of it doesn't.

Anyone else ever tried this before? Did I just get a bad box of Hoodliner?

[Randy S]

we do not use dynamat either, we have 2 methods for handling hood liners.
1) if we want to dampen the metal like dynamat we use NOXUDOL dampening paint which can achieve a 7-9db reduction off the metal.
http://soundproofing.org/infopages/liquid.htm#.Uxn6rz9dWSo

when we want to block sound we use our SSP foam mat at STC 25!
http://www.supersoundproofingsales.com/Foam-Mat/products/17/

[Creeker]

How is the foam mat in terms of moisture and oil? Does it repel fluids at all? And does it have a fire resistant rating? I was wondering if you carried a foil faced version or a MLV faced version.

[Randy S]

The product is oil and moisture resistant.
It is fire rated for use in airplanes and public transportation.
We do not carry a foil face version but you can simply adhere heavy duty aluminum foil to it with 3m 90 high temp spray adhesive.
We do carry a MLV / foam composite
http://www.supersoundproofingsales.com/Mass-Loaded-Vinyl-48W-w_Closed-Cell-per-foot/productinfo/09-00005CC-54F/

Here is a guy that sells our product for custom hood liners.
http://www.hoodliners.net/

[Randy S]

Note: The MLV w/ foam will be very heavy for this application and would require both adhesive and mechanical fasteners.