1. Welcome to 4Runners.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all 4Runner discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other 4Runner owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Lets talk Under coating / Rust Prevention

Discussion in '5th Gen 4Runners (2010+)' started by Jmb0351, Oct 9, 2019.

  1. Oct 9, 2019 at 6:44 AM
    #1
    Jmb0351

    Jmb0351 [OP] New Member

    Joined:
    Aug 18, 2019
    Member:
    #10937
    Messages:
    39
    Gender:
    Male
    First Name:
    Jon
    So I just got a thing in the mail for my 2016 Tacoma that was totaled out back in July. Regarding problems with Frame Corrosion?? Well Obviously I don't have to worry about it since truck is gone. But it was replaced with a new 2019 4Runner.
    And I live in Central Illinois so we get snow and massive amounts of Salt on the road!!

    Whats the best undercoating for rust prevention?? What do you guys out in the North East use? I want to protect my baby!

    And why have they had such problems with the Tacoma's and rusty frames but not other models?? Seems like you never hear of it on 4Runners....

    Thanks for any info, Im kind of new here but everyone is super Helpful : )
     
  2. Oct 9, 2019 at 7:21 AM
    #2
    Benny123

    Benny123 Long term owner

    Joined:
    Mar 4, 2019
    Member:
    #9045
    Messages:
    185
    Gender:
    Male
    Charlotte, NC
    Vehicle:
    2007 V6 SR5 4WD Galactic Gray Mica
    Stock
    Definitely rust issues with 4th gens. I used POR15 on mine after the wire wheel. Came out great. Buy a quart minimum and hit frame, lcas, rear end, spare tire area etc. Dont do the bolt heads, makes them harder to remove.

    Glove up and wear old clothes. Its thick and does not come off skin easily.
     
    Last edited: Oct 9, 2019
    Jmb0351 [OP] likes this.
  3. Oct 9, 2019 at 7:28 AM
    #3
    SlvrSlug

    SlvrSlug New Member

    Joined:
    Jun 3, 2018
    Member:
    #6172
    Messages:
    1,725
    Gender:
    Male
    First Name:
    John
    San Diego, Ca.
    Vehicle:
    2017 4-Runner SR-5
    Slightly modded
    I have seen a lot of good reviews on Fluid Film from this forum.
     
  4. Oct 9, 2019 at 12:09 PM
    #4
    PrettyGoodSam

    PrettyGoodSam New Member

    Joined:
    Aug 23, 2018
    Member:
    #6853
    Messages:
    294
    Gender:
    Male
    Philadelphia
    Vehicle:
    2012 4Runner Trail
    i need to wire wheel a couple of spots and repaint/seal. after that i plan on using fluid film on the undercarriage probably by months end.
     
    Jmb0351 [OP] likes this.
  5. Oct 14, 2019 at 7:26 PM
    #5
    Metalman73

    Metalman73 New Member

    Joined:
    Oct 3, 2019
    Member:
    #11532
    Messages:
    7
    Gender:
    Male
    Fluid Fild works great at preventing rust and keeping the under carriage looking new. Smells awful though.
     
    Jmb0351 [OP] likes this.
  6. Oct 15, 2019 at 4:48 AM
    #6
    DoubleRGirl

    DoubleRGirl New Member

    Joined:
    Oct 12, 2019
    Member:
    #11634
    Messages:
    45
    Gender:
    Female
    First Name:
    Rebecca
    Vehicle:
    2019 TRD Pro
    working on it
    I know a lot of people use fluid film. I go to a place in nh that makes their own stuff that seems to be a little thicker. But I think anything is going to be better than nothing
     
    Jmb0351 [OP] likes this.
  7. Oct 15, 2019 at 7:42 AM
    #7
    PrettyGoodSam

    PrettyGoodSam New Member

    Joined:
    Aug 23, 2018
    Member:
    #6853
    Messages:
    294
    Gender:
    Male
    Philadelphia
    Vehicle:
    2012 4Runner Trail
    wire wheeled a bunch of surface rust off yesterday. cleaned up the areas and used black undercarriage spray paint on the areas. fluid film is the next step. probably next week. gonna be a mess im sure haha
     
    Han4Run and Jmb0351 [OP] like this.
  8. Oct 15, 2019 at 9:36 PM
    #8
    WallyT4R

    WallyT4R New Member

    Joined:
    Aug 7, 2018
    Member:
    #6644
    Messages:
    2,272
    I use fluid film. Have applied it twice myself two years in a row. No rust at all underneath. I am going to not do it this year and see if I can do it every other year.
     
    Han4Run and Jmb0351 [OP] like this.
  9. Oct 16, 2019 at 9:12 PM
    #9
    RC84

    RC84 New Member

    Joined:
    May 10, 2019
    Member:
    #9841
    Messages:
    14
    Gender:
    Male
    Kansas City
    Vehicle:
    2010 4runner Trail & 2019 Tacoma Trd OR
    Trd Pro Bilstein with 14" 600 lb springs Fox 2.0 resi with Toytec Superflex springs 17 x 8.5 SCS F5 wheels 255 80 17 Cooper ST Max
    I also vouch for fluid film.

    Here's a 10 year old vehicle with regular fluid film applications.

    20191015_155113.jpg 20191015_155147.jpg 20191015_155135.jpg 20191013_171122.jpg 20191013_171055.jpg 20191013_171020.jpg
     
    TRDPro916, SKT_07, Han4Run and 5 others like this.
  10. Oct 17, 2019 at 12:35 PM
    #10
    Jmb0351

    Jmb0351 [OP] New Member

    Joined:
    Aug 18, 2019
    Member:
    #10937
    Messages:
    39
    Gender:
    Male
    First Name:
    Jon
    Thanks! Sounds like Fluid Film is the way to go! Try and get a coat on before the snow flies
     
    Oldtoyotaguy, Han4Run and WallyT4R like this.
  11. Oct 17, 2019 at 12:51 PM
    #11
    RC84

    RC84 New Member

    Joined:
    May 10, 2019
    Member:
    #9841
    Messages:
    14
    Gender:
    Male
    Kansas City
    Vehicle:
    2010 4runner Trail & 2019 Tacoma Trd OR
    Trd Pro Bilstein with 14" 600 lb springs Fox 2.0 resi with Toytec Superflex springs 17 x 8.5 SCS F5 wheels 255 80 17 Cooper ST Max

    I've been using it for years on all my vehicles.

    Start off by hitting all of the hard to reach places...crawling under the car. It makes the process easier if you jack up the car and remove wheels but not necessary. I also make sure to hit up any holes in the frame etc. Then do a nice even spray on the larger easier to reach areas. Entire process takes me around 30-40 min + 3-4 cans of fluid film.
     
    WallyT4R and Jmb0351 [OP] like this.
  12. Dec 15, 2019 at 12:16 PM
    #12
    T4R13

    T4R13 New Member

    Joined:
    Dec 15, 2019
    Member:
    #12339
    Messages:
    8
    Gender:
    Male
    Wool wax. Made by same people thicker stays on better and has no smell also can get it in black
     
    Jmb0351 [OP] likes this.
  13. Dec 17, 2019 at 7:46 AM
    #13
    RusPro17

    RusPro17 New Member

    Joined:
    Sep 26, 2017
    Member:
    #4821
    Messages:
    342
    Gender:
    Male
    First Name:
    Don
    Pa.
    Vehicle:
    2020 TRD Pro
    My 2020 Pro going this Monday to have the fluid film done. Getting it done before I put any miles on my Pro. Been sitting in the garage since I bought it and waiting to have this done.
     
    Han4Run, WallyT4R and Jmb0351 [OP] like this.
  14. Dec 17, 2019 at 8:35 AM
    #14
    Jmb0351

    Jmb0351 [OP] New Member

    Joined:
    Aug 18, 2019
    Member:
    #10937
    Messages:
    39
    Gender:
    Male
    First Name:
    Jon
    Good Idea, I wish I had been thinking about this a few months ago? Lol

    I ordered some fluid film off Amazon and did as much as I could. i will get it on a lift and hit it again next summer. It works, you can see the water bead right off the hitch.
     
    WallyT4R likes this.
  15. Dec 17, 2019 at 8:48 AM
    #15
    RusPro17

    RusPro17 New Member

    Joined:
    Sep 26, 2017
    Member:
    #4821
    Messages:
    342
    Gender:
    Male
    First Name:
    Don
    Pa.
    Vehicle:
    2020 TRD Pro
    Yeah there’s a guy on the other Toyota forum pretty close to
    me that does the 4runner. He recommends every 2 years. Unless you want to be over protective you can do it every year.
     
    WallyT4R likes this.
  16. Dec 17, 2019 at 11:07 AM
    #16
    Ajmogen

    Ajmogen New Member

    Joined:
    Sep 20, 2018
    Member:
    #7211
    Messages:
    60
    Gender:
    Male
    First Name:
    Aaron
    Wisconsin
    Vehicle:
    2016 Red Tacoma 2017 Red 4R 2010 Red Yaris
    I fluid film all my vehicles every year and don't drive the 4Runner until spring.
     
  17. Dec 17, 2019 at 12:38 PM
    #17
    josefmd

    josefmd New Member

    Joined:
    Sep 29, 2016
    Member:
    #2752
    Messages:
    55
    Gender:
    Male
    Vehicle:
    2017 Cement TRD 4R Pro
    Been using FF since 2014 using it on two previously owned Tacoma’s and the 4R. I havnt applied it this yr, but prob should touch up some spots!!
     
    WallyT4R likes this.
  18. Dec 19, 2019 at 9:25 AM
    #18
    Ramrod88

    Ramrod88 Drives a 4Runner on a Corolla budget

    Joined:
    Dec 10, 2016
    Member:
    #3167
    Messages:
    56
    Gender:
    Male
    First Name:
    Rodney
    New Orleans
    Vehicle:
    17 TRD OFF ROAD
    Im assuming you get under there and thoroughly wash everything before applying the fluid film or that thing never sees an ounce of dust. Either way, that frame is a beaut
     
  19. Dec 19, 2019 at 3:24 PM
    #19
    SKT_07

    SKT_07 New Member

    Joined:
    Dec 3, 2019
    Member:
    #12204
    Messages:
    47
    I've used Fluid Film in the past with success; although, I never liked the fact that it remains wet to the touch and attracts dirt. Messy if working on vehicle after application and dirt clings to it. Since it remains wet, it gradually 'rinses' off with each undercarriage rinse throughout the winter. Benefit to not drying is that it can work its way into cracks and crevices.

    After extensive research, I chose AMSOIL Heavy-Duty Metal Protector (HD MP)for my '20 4Runner. Very happy with the application and confident on the protection. Many videos online about this product. Sprays on from 15oz. aerosol cans as a yellowish colored liquid, but dries as a wax-like coating that appears mostly clear. Does not attract dirt, but provides great protection for all treated areas.
     
    Ajmogen, FRE1809 and Jmb0351 [OP] like this.
  20. Dec 23, 2019 at 6:55 PM
    #20
    RusPro17

    RusPro17 New Member

    Joined:
    Sep 26, 2017
    Member:
    #4821
    Messages:
    342
    Gender:
    Male
    First Name:
    Don
    Pa.
    Vehicle:
    2020 TRD Pro
    I had my fluid film done tonight from Steve in NJ. He has posting on the Toyota forum. Well worth the drive from Pa to NJ. Very professional and great guy to meet. He did a awesome job on my 2020 Pro.
     
  21. Dec 24, 2019 at 3:44 PM
    #21
    T4R13

    T4R13 New Member

    Joined:
    Dec 15, 2019
    Member:
    #12339
    Messages:
    8
    Gender:
    Male
    Iv got a 55 gal drum of wool wax if anyone is interested
     
  22. Dec 24, 2019 at 6:17 PM
    #22
    Ramrod88

    Ramrod88 Drives a 4Runner on a Corolla budget

    Joined:
    Dec 10, 2016
    Member:
    #3167
    Messages:
    56
    Gender:
    Male
    First Name:
    Rodney
    New Orleans
    Vehicle:
    17 TRD OFF ROAD
    Heres what crc heavy duty corrosion inhibitor looks like on the frame. For those who haven’t used it its a VERY clingy wax that dries like candle wax and last a long time even on high wash areas. Also you can see how the water just beads off it like duck feathers

    1ABA8FB7-3E06-41A5-B2A6-1AF0D5C4FB3A.jpg
    1B60F1C1-6FBF-47BD-A678-C369FB85E440.jpg
     
  23. Dec 24, 2019 at 6:59 PM
    #23
    Riding Dirty

    Riding Dirty Sinner; saved by grace

    Joined:
    Jul 19, 2017
    Member:
    #4416
    Messages:
    272
    Vehicle:
    2017 T4R Pro 040
    Is plasti-dip a mod?!
    I use fluid film once a year, all my yotas are rust free.
     
    Han4Run and WallyT4R like this.
  24. Dec 25, 2019 at 5:01 AM
    #24
    Han4Run

    Han4Run New Member

    Joined:
    Nov 30, 2019
    Member:
    #12161
    Messages:
    14
    Gender:
    Male
    Vehicle:
    2019 TRD Pro 4Runner
    Same with mine. Had a Tacoma for 4 years in NY salt and frame looked excellent when I traded.
     
    WallyT4R and SKT_07 like this.
  25. Jan 6, 2020 at 7:01 PM
    #25
    Gearhd79

    Gearhd79 New Member

    Joined:
    Dec 11, 2019
    Member:
    #12298
    Messages:
    3
    Gender:
    Male
    Pennsylvania
    Vehicle:
    2019 Toyota 4Runner TRD off Road
    none...Yet
    has anyone here heard of Krown coatings? I had it done to my Ford F250 last year and as long as i have it done once a year its warrantied for the life of the vehicle..its a proven thing in Canada. This is a treatment for the inside of the body of the vehicle rockers inside doors ,fenders etc..as well as the complete underbody and inside outside of chassis etc.. anyone heard of it? I just bought my 4 runner and probably going to have it done too in the next few weeks
     
    SKT_07 likes this.
  26. Jan 8, 2020 at 1:39 PM
    #26
    TRDPro916

    TRDPro916 New Member

    Joined:
    Jul 13, 2019
    Member:
    #10535
    Messages:
    70
    Gender:
    Male
    Vehicle:
    4Runner Pro
    Currently stock; MODS coming soon.
    Do you have pics of the under body after fluid film? How much fluid did they use?
     
  27. Jan 8, 2020 at 1:52 PM
    #27
    RusPro17

    RusPro17 New Member

    Joined:
    Sep 26, 2017
    Member:
    #4821
    Messages:
    342
    Gender:
    Male
    First Name:
    Don
    Pa.
    Vehicle:
    2020 TRD Pro
    I did not take any pics. Steve that did it took pics and sent them to me while he was doing it. He covered it really good. It was coated really thick. He does his 17 Pro every year. But he recommends every 2 years. Unless you want to be really fussy then you can do the same. I’m going to wait to see what it looks like in a year and determine if it needs it again.
     
    WallyT4R and TRDPro916 like this.
  28. Jan 9, 2020 at 6:43 AM
    #28
    PrettyGoodSam

    PrettyGoodSam New Member

    Joined:
    Aug 23, 2018
    Member:
    #6853
    Messages:
    294
    Gender:
    Male
    Philadelphia
    Vehicle:
    2012 4Runner Trail
    weather and my timing has been shitty so i am hoping to get mine done on saturday or sunday. weather looks good, hoping the rain holds off!
     
    WallyT4R likes this.

Products Discussed in

To Top