06-02-2018, 12:50 PM
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#16
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Quote:
Originally Posted by tristero
I'd use the sikasil vs RTV or other silicone
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It's the same with them. They have neutral cure and acetoxy cure versions.
Most companies make both..... but if you just go to a hardware store, they usually have the general purpose stuff which is more likely to cure and form acetic acid.
I don;t think you can go wrong with the high quality stuff from any manufacturer.
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06-02-2018, 01:32 PM
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#17
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If you're concerned about acetic acid, check out used Dow Corning 995 Silicone. It uses stearic acid for solvent. Stearic acid is supposedly used for rust-proofing.
However, Urethane windshield adhesive (like Sika that Safelit uses) is much more robust than silicone, although messier to work with.
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86 4Runner, 22R-Eliable, 5-Speed Manual, dlx. WHAT'S YOURS?
If you want us to help from afar please let us see, hear, feel what you're dealing with.
A picture paints a thousand words.
Toyota components are bullet-proof. Issues often arise from poor wiring, assembly and/or maintenance. Suspect those first.
Next only to our senses, the multi-meter is the most important electrical diagnostic tool. Spend $6 at Harbor Freight or $$$ blindly replacing parts.
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06-02-2018, 01:41 PM
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#18
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Does anyone have experience with this product. I picked it up from O’Reilly. It’s ATV silicone, but marketed as gasket maker/replacement.
It’s the Ultra line from Permatex, which according to the suggestions on other packs,  shouldn’t cause paint/finish damage.
Sent from my iPhone using Tapatalk
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06-02-2018, 02:56 PM
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#19
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Join Date: Jun 2015
Location: Georgia
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I would use one of the 3M marine sealants. 5200 is a very durable sealant, very hard to remove after cured. I use it on all of my thru-hull fittings on my boat. 4200 is also very durable, easier to remove.
https://www.amazon.com/3M-Marine-Adh.../dp/B01D893GGY
https://www.amazon.com/3M-Marine-Adh...6KAD1DMBR6NHFY
The sealant in the picture is a great sealant and should work just fine.
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2015 2WD Blizzard Pearl Limited, Black Interior
Last edited by Rmack; 06-02-2018 at 02:59 PM.
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06-03-2018, 09:49 PM
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#20
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I went with the RTV Silicone. Thank you to all for the advice. If I have any issues, I’ll post them here.
Below are som pics of the powder coated rails installed.
 
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2018 TRDORP w/KDSS, Cooper AT/3s, Rago cross bars, TRDP Black wheels, front grille, black valances, Kenwood Excelon DNX996, working on the rest...
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07-13-2020, 07:00 AM
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#21
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Join Date: Jun 2015
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How are the seals holding up?
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10-22-2020, 08:39 AM
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#22
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Join Date: Aug 2020
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Quote:
Originally Posted by Chubbypanda
How are the seals holding up?
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Bump. I'd like to know as well since I recently installed a Prinsu rack using RTV silicone to seal in and around the bolt holes.
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2020 TRD ORP XP Predator - Classic Silver - 265/70R17 Nitto Ridge Grapplers - Moonroof - Sliding rear cargo tray - Dual front USBs
Mods in order of install: Screen protector, Badge delete, Pin stripe delete, Husky floor liners, Center console organizer, Predator step delete, Kicker dash tweeters, Prinsu full no-drill rack, Toyota rock rails, Low profile rain guards, Interior, reverse & turn signal LEDs, Lasfit Pro LED low beams
Awaiting: Roam 5ft awning
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10-22-2020, 08:50 AM
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#23
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Butyl tape is another option for sealing. It stays flexible and if you have to redo it you won't have the silicone to deal with. It's simple to use and has a great reputation having been around a very long time.
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1989 4Runner v6/5spd. 1993 4Runner SR5, 2002 Sequoia Ltd, 2007 4Runner Ltd, 2015 4Runner Trail Edition, and 54 assorted others
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10-22-2020, 11:17 AM
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#24
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This thread got bumped at the perfect time. I discovered a puddle in the driver's side of the cargo area yesterday, in the little cubby above the wheel well. The headliner's only wet above this area, so I'm suspecting the factory roof rails vs. moonroof drains. Anyone else had issues with the factory setup leaking? I'm the 2nd owner, and as far as I know, they've never been removed.
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10-22-2020, 12:51 PM
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#25
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Quote:
Originally Posted by BenderRodriguez
This thread got bumped at the perfect time. I discovered a puddle in the driver's side of the cargo area yesterday, in the little cubby above the wheel well. The headliner's only wet above this area, so I'm suspecting the factory roof rails vs. moonroof drains. Anyone else had issues with the factory setup leaking? I'm the 2nd owner, and as far as I know, they've never been removed.
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The factory mounts use just a "foam washer" between the foot of the rail and the body, so they can easily deteriorate over time. It is so easy to take the rails off and add some sealant in place of those foam washers.
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10-22-2020, 01:16 PM
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#26
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The seals are holding up well - no issues with water in the headliner or anywhere else.
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2018 TRDORP w/KDSS, Cooper AT/3s, Rago cross bars, TRDP Black wheels, front grille, black valances, Kenwood Excelon DNX996, working on the rest...
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10-22-2020, 01:17 PM
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#27
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Quote:
Originally Posted by DreamsOfDirt
The seals are holding up well - no issues with water in the headliner or anywhere else.
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Glad to hear it! Thanks for the update.
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2020 TRD ORP XP Predator - Classic Silver - 265/70R17 Nitto Ridge Grapplers - Moonroof - Sliding rear cargo tray - Dual front USBs
Mods in order of install: Screen protector, Badge delete, Pin stripe delete, Husky floor liners, Center console organizer, Predator step delete, Kicker dash tweeters, Prinsu full no-drill rack, Toyota rock rails, Low profile rain guards, Interior, reverse & turn signal LEDs, Lasfit Pro LED low beams
Awaiting: Roam 5ft awning
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10-22-2020, 04:22 PM
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#28
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Quote:
Originally Posted by fkheath
The factory mounts use just a "foam washer" between the foot of the rail and the body, so they can easily deteriorate over time. It is so easy to take the rails off and add some sealant in place of those foam washers.
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That's what it looks like. I took apart the trim in the cargo area and poured water and indeed tracked it to the rear driver's side mount. I've got the rails removed now, just debating whether to replace the factory parts or try something else.
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10-23-2020, 12:03 AM
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#29
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I used butyl rubber tape around the mounts when I had my roof rails powder-coated. "3M Windo-Weld Round Ribbon Sealer"
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10-23-2020, 05:34 AM
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#30
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Butyl tape. McMaster Carr sells rolls of it and it can be removed without damaging the paint. It's the same stuff that Toyota used in the first place.
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