Topic: rear seat underlayment

[lightwtjet]

The tar underlayment beneath my rear seat no longer adhered to the floor pan. As I read about materials designed to reduce tire/exhaust noise they must adhere strongly and have reasonable mass ( perhaps 1/8 inch thick). It appears to me that is what Ford attempted to do with the tar. Agree?

[warwick]

Richard-no foil.

Re: tar, I have just the tar/paper on gas tank and on floor pans and it is stuck on real good. In addition behind the rear seat a tar with clear plastic/cellophane covering (ie: no paper) is used.

[RichardM68]

Interesting yours doesn't have foil.  Because there were so many different underlayments used, it's tempting to just throw something that's supposed to be "concours" after-market in there, but this car is too original.  I'm going to try to replicate mine. 

thanks for the info.

-Richard

[J_Speegle]

The tar underlayment beneath my rear seat no longer adhered to the floor pan. As I read about materials designed to reduce tire/exhaust noise they must adhere strongly and have reasonable mass ( perhaps 1/8 inch thick). It appears to me that is what Ford attempted to do with the tar. Agree?

Don't believe it was designed or expected to adhere. If so then at least one of the suppliers would have not used a very think layer of plastic during some of the years as the final top layer. Believe the tar like layers added density for both sound and heat while it would easily bond itself to the jute layer without the need for glue or addition produces. Just heat would do the job.

There were not a lot of different suppliers every year just more than a single type or supplier. From the single ply used in many of the 65-66 years to the later multiple layered ones later in the 60's

[warwick]

Per requests here is a picture of the rear seat underlayment in my car. It is original to car. The yellow fiberglass insulation is only found under the rear seat. Note the white foam material is where the rear seat sits-it is original. In the rest of the car including on fuel tank it is approx 1/8" tar with oil paper-it is stuck pretty good to floor. Between the rear seat back and trunk there is a 1/8" tar sheet with a cellophane covering. I probably have some other pics if needed.