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Something wrong with this roof sealant?

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  • Something wrong with this roof sealant?

    I went over the roof sealant in my 2021 381m in any questionable areas about 10 days. I used Acetone to clean the areas and Alpha Systems Lap Sealant, which is what the manual recommends and not Dicor. (It was a PIA to find this stuff)

    I went up there to check on how it settled and it's very weird. It's got soo many bubbles through it. It's still very soft too. I could "smoosh" all the bubbles together in areas if I spend enough time on it. Is all this normal? Could the Sealant I got be bad? Could the fact that it's been 100+ here every day have to do with it?

    I attached pictures for reference. As you can see, I got the wrong color as I mistook the dirt baked onto the past sealant as the color of it! Luckily it's on top and doesn't matter. Click image for larger version

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    2021 Grand Design Momentum 381m
    2020 Ram 3500 8ft

  • #2
    I can't help you with the bubbles, but I used the same product as advised. It is still soft and tacky after 3 weeks. Everything is sticking to it.


    • #3
      That is very interesting with the small concave bubbles like that. Do you think it would be worth while putting a test together, where you put the same sealant on some scrap material, like cardboard or plywood, and let it dry for a few days in a cooler environment? That may help show if it was the heat. Just a thought.... The sealant still being rubbery doesn't surprise me though. The sealant is supposed to stay soft and pliable, otherwise it will crack and start to leak.

      In the rare off chance you don't get any response here, maybe consider contacting Alpha with your pictures and ask them ( If you do hear from Alpha, be sure to let us know what they say.
      2019 Imagine 2400BH
      2019 F150 XLT Super Crew, EcoBoost, 6.5' box, 3.55 ratio


      • #4
        Looks like to me that is an old batch perhaps beyond the shelf life or, could have been frozen in the tube sometime in its life. Just speculation.
        Grand Design Imagine 2450RL 2020 born 7/2019
        TV - 2007 Toyota Tundra 5.7 4X4 Limited w/Towing PKG under 30K miles, hanger queen until now


        • #5
          Two thoughts - first, I'm guessing the Alpha product stays tacky for a while. Our brand new trailer came decorated with many leaves stuck in the roof sealant. 😁.

          Second, I found Alpha Systems customer support to be very helpful the time I called. The rep even had me text pictures while we were talking and she reviewed them during our call. I'd go direct to the source.
          Mike and Rebecca
          2022 Reflection 150 260RD
          2001 Chev 2500 HD 8.1 liter 4x4