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Periodic Undercoating

Posted: Wed Sep 03, 2025 7:59 am
by rpaoness
I'm finally running out of the last of my 1st 5 gallon pail of Fluid Film after 27 months of coating most of my cars/trucks undercarriages every oil change.

My original plan was to switch to woolwax after each vehicle got an initial two or three sprayings of fluid film. I have changed out one of those vehicles now, so I'm wondering if I should just get fluid film or something else.

None of them look cosmetically bad underneath, so I think I'm going to do "clear"/yellow and not the black option for whatever I buy.

Options considered:
1.) Fluid Film - $168
https://www.amazon.com/gp/product/B004N ... OCDM&psc=1

2.) Woolwax - $239
https://www.amazon.com/woolwax-Lanolin- ... 104&sr=1-4

3.) B'laster - $213
https://www.amazon.com/gp/product/B09HG ... WVN9&psc=1

4.) NHOU (New Hampshire Oil Undercoating - $260 - Apparently a mix of petroleum oil and lanolin. They advertise that it includes mouse-out.
https://nhoilundercoating.com/product/n ... ercoating/

Re: Periodic Undercoating

Posted: Wed Sep 03, 2025 8:16 am
by rpaoness

Re: Periodic Undercoating

Posted: Wed Sep 03, 2025 8:29 am
by rpaoness
They have another non-V3 option for $236:
https://nhoilundercoating.com/product/n ... mouse-out/

Re: Periodic Undercoating

Posted: Wed Sep 03, 2025 12:51 pm
by kevm14
I like Surface Shield. But keeping up with it and getting a build up is probably more important than the product itself though it seems like Surface Shield is probably the best of the three.