Peel-n Seal Roofing as Sound Deadening Lesson Learned

[sick472]

I have been an advocate of using the cheap alternative, Peel-n Seal roofing, in lieu of the Dyno-Mat type brands. This p-n-s works well in most locations, but I learned a lesson with my recent C/10 build. The p-n-s is a tar-like substance while the profession brands are a butyl rubber, I believe. The professional brands are not prone to melting and letting go while the tar in the p-n-s...well, it's tar.

I used it on the cab floor AND it is taking on heat from the exhaust and softening up enough to make its way past the front cab mount bolts and rubber bushings, and dripping out below onto the shop floor.

It does not seem to drip while driving as the wind must keep the underside of the cab floor cooler. Once I park it, the heat soaks upwards heating up the floor. This is causing it to melt and goo though the bolted front cab mount connections.

I am hoping that it neutralizes itself by melting out the necessary amount to stop on its own. I only have 200 miles on it. Otherwise I may be taking the carpet up and scraping, cleaning, and sealing up the bolt heads with silicone or something.

I just wanted to throw this out there so that others that need the budget savings can take some preventative measures and not end up having to put cardboard under the front cab mounts when parked.

The other car project that I used p-n-s on was a unibody with no floor penetrations and has no issues, but our trucks will need to have the front mount holes sealed up. It may end up in the rocker gutter, however. I would like to think that the bolt holes being sealed would stop the flow and the surrounding cooler p-n-s would prevent the melted stuff from getting very far. Time will tell and I will post if it takes care of itself or if I have to back up and take a different approach.