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  1. #1
    Site Sponsor J Maguire's Avatar
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    AC installation and Eternabond Question

    Question in how to lay out the Eternabond tape so there isn't any gaps where the four corners of the 14" x 14" hole come together. The vent is removed and the surface is clean and flat but it seems no matter how you lay out the tape there's going to be room for moisture to creep in. Please advise. Thanks!
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

  2. #2
    Site Sponsor NB Canada's Avatar
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    What is the eternabond for?

    Isnít there just a foam gasket?


    2021 Imagine 2400 BH
    2018 GMC Sierra 4x4 crew
    2021 Imagine 2400 BH
    2018 GMC Sierra 4x4 Crew 1840lb payload

  3. #3
    Site Sponsor J Maguire's Avatar
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    Quote Originally Posted by NB Canada View Post
    What is the eternabond for?

    Isn’t there just a foam gasket?


    2021 Imagine 2400 BH
    2018 GMC Sierra 4x4 crew
    Cleaning up the space some of the roof needed to be removed. Too uneven and sticky to leave intact.
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

  4. #4
    Site Sponsor J Maguire's Avatar
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    Picture of the space.

    The cleaned up area needing coverage.

    Click image for larger version. 

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    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

  5. #5
    Site Sponsor NB Canada's Avatar
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    Quote Originally Posted by J Maguire View Post
    The cleaned up area needing coverage.

    Click image for larger version. 

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    Ouch


    2021 Imagine 2400 BH
    2018 GMC Sierra 4x4 crew
    2021 Imagine 2400 BH
    2018 GMC Sierra 4x4 Crew 1840lb payload

  6. #6
    Big Traveler geotex1's Avatar
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    Place your laps to resist wind. So, rearward piece, then sides and then front. I'd personally foil tape the opening sides first with a 1 inch turn onto the roof deck and then E-tape with a small turndown into the opening. Use a seam roller and a little heat and get that E-tape nice an flat. Your air conditioner gasket will seal fine over the laps. This is one place I would not use lap sealant on the edge of the E-tape because you don't want to dike up the condensate.
    Last edited by geotex1; 03-29-2021 at 06:37 PM.
    Rob & Nikki + Cloverfield
    2020 Grand Design Solitude S-Class 3350RL
    2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN

    Mountains of Pennsylvania

  7. #7
    Site Sponsor J Maguire's Avatar
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    Quote Originally Posted by geotex1 View Post
    Place your laps to resist wind. So, rearward piece, then sides and then front. I'd personally foil tape the opening sides first with a 1 inch turn onto the roof deck and then E-tape with a small turndown into the opening. Use a seam roller and a little heat and get that E-tape nice an flat. Your air conditioner gasket will seal fine over the laps. This is one place I would not use lap sealant on the edge of the E-tape because you don't want to dike up the condensate.
    All cleaned up and taped up. No problem. Seal looks great! Next time I'll try not to get so carried away when cleaning things up. ��
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

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