Undercoating (need northerner opinion)

BillyHW

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I would avoid the dealer undercoating. There are better third party options.

I would also avoid any of those black tar-like undercoatings. They help at first, but they eventually crack and flake and then trap moisture inside and make the problem worse in the end. There are wax and oil based options that are better in my opinion.

Check out my rustproofing poll here:

https://www.jlwranglerforums.com/forum/threads/the-great-rust-proofing-poll.3843/

Fluid Film (was based) and Krown (oil based) are in the lead.
 

jhern88

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I second Fluid Film or Krown. I have a local Krown dealer near me and get my undercarriage done once a year. Amazing stuff and will keep your undercarriage looking like new, even in the Northeast.
Fluid film is okay not the best collect dirt also wash away when you do car wash.
 

jhern88

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2019 WRANGLER SPORT JL 4 DOORS V6
I would avoid the dealer undercoating. There are better third party options.

I would also avoid any of those black tar-like undercoatings. They help at first, but they eventually crack and flake and then trap moisture inside and make the problem worse in the end. There are wax and oil based options that are better in my opinion.

Check out my rustproofing poll here:

https://www.jlwranglerforums.com/forum/threads/the-great-rust-proofing-poll.3843/

Fluid Film (was based) and Krown (oil based) are in the lead.

Fluid film is okay not the best collect dirt also wash away when you do car wash.
 

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