Body seam sealer under floor tar

[Hans3]

What's the modern equivalent of the body seam sealer that lines the floor metal under the insulating tar paper (1st-gen)?  It has the consistency of dried silly putty but was likely pliable back in the day.

 

On same topic, is there a modern floor liner substitute with similar appearance to tar paper?  Not a fan of the look or price of space shuttle-grade Dynamat.

[JZRIV]

https://www.semproducts.com/product/1k-seam-sealers/29392

This would have only been applied to the seams/joints in metal and often quite sloppy application. There are other quality brands besides SEM. Any good body shop supply will have it.

 

I never liked the modern look of Dynamat either even though you can't see it once carpeting is down. I never used it in any Riv I redid but have used it in other vehicles when someone else was paying for it. LOL. Having said that it is a superior product.....and should be for the price.

The original thick tar-backed fiber board is not reproduced as far as I know. I have painstakingly removed original stuff in pieces so it could be reused. It can be melted back together with a heat gun. On different occasions I have used a couple layers of old style 30lb roofing felt paper which is asphalt impregnated. 

Edited June 10, 2022 by JZRIV (see edit history)

[NTX5467]

3M could well have been the supplier for the seam sealer product, back then.  Can be had in caulking gun tubes, now.

 

Might use the spray-on LizzardSkin product as an alternative to Dyna Mat or similar?  It can be used inside or outside.

 

Just some thoughts,

NTX5467