The home we purchased has an older pole barn that has nailed roof panels. They are old and some are leaking. Not visibly but the vapor barrier has some pools that can be seen from inside. It will need a new roof eventually but as a stop gap measure I want to seal the roof nails (about 2000). The most appropriate product I can find is a polyurethane product by Loctite https://www.amazon.com/Loctite-Polyurethane-Construction-Cartridge-1390595/dp/B001E3VQBE/ref=cm_cr_arp_d_product_top?ie=UTF8&th=1
Replacing the nails with screws is out of the question and way too much work for a old roof. wondered if anyone has done the same thing.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT

I use generic wet and dry roof sealant, with big playtex gloves and putty knife. for shingles too.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

I was considering having the roof recoated but decided not worth the money since the roof is probably 50 years old and about 2000 ft sq. There are a few rusty areas. We are about .5 mi from the ocean so there is some salt. I'm amazed it lasted this long.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT

Asphalt sealer?

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero