Good Year makes an excellent undercoat spray that will also give some slight sound dampening. Wear Gloves and a shirt you do not care about when you get ready to apply it. There is also a temp range if memory serves, so you need to apply before the chill sets in. Put something on the drive or garage floor to catch the overspray. Keep your face away from the area being sprayed and wear your safety glasses. And you need to cover your hair also. Sort of messy but good stuff and it even stuck on areas that there slightly oil covered. You will want to degrease and clean the area being coated.

It has a black almost like asphalt base to it and you shake it up and spray on. I used this after doing floor board repair last year with Por 15.

It will coat almost any metal part with a single spray and after a year of running down the road still firmly coating every thing. Have not seen an single place where it came loose. I ended up using it on the gas tank where the old coating had come off and applied it from front to back. Took four or five cans to do everything. Wrapped paper around the transmission, drive shaft, and any other place that needed protection and coated all the exposed surfaces.

You can find it at Auto Zone and a couple of the other Auto Chains in the paint section. McMaster Carr has if under Rubberized Sealant and Undercoating— Black near the bottom of page 2092 for less than $6 a can.

Good Stuff and it will last.

Regards,

Paul