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leak underneath bed-rail cover??

Discussion in '3rd Gen Tundras (2022+)' started by Oakman, Jun 2, 2023.

  1. Jun 2, 2023 at 2:25 PM
    #1
    Oakman

    Oakman [OP] New Member

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    I have the diamondback bed cover, and it worked great until the first heavy rain and subsequent rainy days. It all started when we were on the highway from a long road trip and our belongings got wet really bad. Nevertheless, I contacted the company, they worked with me to resolve the issue, and as we were trying to troubleshoot the leak source, I was told that bed-rail cover can cause leak when it is bend from being tight around the middle clamps. So I took off the bedcover, and let the truck rest in the direct sunlight, luckily the bed-rail cover went back to its original form and no gap was noticed. Now, I figured if I apply sealant then it will maximize the waterproof function, it was easy straight forward as shown below, my question? did anyone tried similar sealant application before? what are the long term observations?

    Thank you


    After re-applying the sealant and reattaching the bed-rail cover
    IMG_6069.HEIC.jpg

    Sealant application
    IMG_6070.jpg
     
    Last edited: Jun 3, 2023
    AND likes this.
  2. Jun 3, 2023 at 11:55 AM
    #2
    AND

    AND New Member

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    I think this is what companies like Superpacific campers, GFC campers, etc do when they install their campers.
     
  3. Jun 3, 2023 at 12:13 PM
    #3
    Oakman

    Oakman [OP] New Member

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    That's what I did in an attempt to treat the possible source of water leak, not sure if future problems will arise out of this mini project.
     
  4. Feb 15, 2024 at 4:31 AM
    #4
    Bergy24

    Bergy24 New Member

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    I know this is an old thread, but did the attempts to seal under the caps work?
     
  5. Feb 15, 2024 at 8:42 AM
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    RickyPNW

    RickyPNW New Member

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    Following. I have the DB cover as well and it leaks a fair amount at the corners and center panel. I added tailgate seals, and additional foam padding around the joints of the center panel, but no luck. DB's solution was to send me new weather stripping for all the panels, so that's next on my list.
     
  6. Feb 15, 2024 at 12:26 PM
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    Oakman

    Oakman [OP] New Member

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    It is much better after redoing it again, here is my review after a year:
    when you apply silicone sealant run over it again to create 2-3 mm paste. that will help eliminating uneven surface when you apply pressure specially after installing the bed cover. if you don't feel comfortable applying paste you can use weather stripping seal liker this (I used both sealant and weather stripping):

    https://www.amazon.com/gp/product/B07471S61T?ie=UTF8&th=1

    Cut the weather stripping into half (width less than an inch) and run it underneath the bed rail. worked great for me. The next step is to sand the upper part, when it rains hard or I drive on the highway there is a leak from around the uneven surface. please see attached picture.

    I'll do it this coming spring while installing CBI bumper/winch/light bar.

    Good luck

    upload_2024-2-15_15-23-9.jpg
     
    RickyPNW and Bergy24[QUOTED] like this.
  7. Feb 15, 2024 at 12:57 PM
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    RickyPNW

    RickyPNW New Member

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    I'm also contemplating sanding down the pattern on the caps as well. Honestly might be necessary since the weather stripping on the DB cover doesn't contour very well.

    @Oakman - do you happen to have any pictures of the underside of the plastic bedrail caps? Also, how did you remove them? When I tried to do it, it felt like I was going to break the clips holding them onto the bed.
     
  8. Feb 15, 2024 at 1:13 PM
    #8
    Oakman

    Oakman [OP] New Member

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    Removing them was easy, just do not put more power or over angle them when you are pulling up, start from the bed gate, they are easy to break,
    Attached some pictures during the second round after scraping and reapplying the silicon underneath, these pictures for the weather stripping part

    upload_2024-2-15_16-12-57.jpgupload_2024-2-15_16-12-57.jpgupload_2024-2-15_16-12-57.jpg
     
    RickyPNW[QUOTED] likes this.
  9. Feb 15, 2024 at 1:21 PM
    #9
    PAlittlematty

    PAlittlematty New Member

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    This weatherstripping you’re putting down is foam. It’s not a sealant. Looks like it’s adhesive backed on both sides correct?
     
  10. Feb 15, 2024 at 1:27 PM
    #10
    RickyPNW

    RickyPNW New Member

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    The raised edges might also create little gaps where water can leak through.

    I wonder if you can actually add weather stripping on the inner wall of the cap towards the inside of the bed so that it traps any water from dripping down.

    upload_2024-2-15_13-27-5.png
     

    Attached Files:

  11. Feb 15, 2024 at 1:28 PM
    #11
    RickyPNW

    RickyPNW New Member

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    Thank you! Seeing what the clips look like will help a lot.
     
    Oakman[QUOTED][OP] likes this.
  12. Feb 15, 2024 at 1:31 PM
    #12
    Oakman

    Oakman [OP] New Member

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    I spread silicone sealant on the metal part underneath the bed rail cover and on the plastic part the weatherstripping. it is adhesive on one side,
     
  13. Feb 15, 2024 at 1:32 PM
    #13
    Oakman

    Oakman [OP] New Member

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    That's a good idea, I haven't tried it. So far no issues underneath the bedrail cover
     
    RickyPNW[QUOTED] likes this.
  14. Feb 15, 2024 at 1:44 PM
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    PAlittlematty

    PAlittlematty New Member

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    If you’re looking to totally stop water you’ll need something that’s more of a gasket. I don’t know how deep you wanna go with trying to stop water. But there are better options
     

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