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Post Info TOPIC: Roof Sealant


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Roof Sealant


Looking to replace rooftop aircon. What would be the best sealant to use on roof ?  Thanks



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Guru

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What ever sealant you use, surface preparation is probably the most important step. Sika has a large range of sealants for various applications.

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Guru

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The sealant that was used under my Dometic aircon was very fluid. It actually ran onto the floor when I removed the inside sections. There must be a reason for this. Talk to an aircon supplier.

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Guru

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Sikaflex Pro.
Cheers,
Peter

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OKA196 DIY, self contained 4WD motorhome, 1280W PV, 326Ah of CALB LiFePO4 batteries, 1.3kW inv, 310L water, 350-450L diesel.



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Ineedabiggerboat wrote:

The sealant that was used under my Dometic aircon was very fluid. It actually ran onto the floor when I removed the inside sections. There must be a reason for this. Talk to an aircon supplier.


 I actually called the local caravan repair/installer and he says he does at least one and day and uses roof and gutter silicone. Im sure he knows what hes doing, but it didnt seem right to me, which is why I asked. Cheers



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Just telling you how mine was.

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Guru

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Silicone is banned from my vehicle.
Once it is on a surface, it is extremely difficult to remove and nothing else will stick there.
It will collect dirt, but is not paintable.
Caravan repairers like it because it is cheap and it works.
Cheers,
Peter

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OKA196 DIY, self contained 4WD motorhome, 1280W PV, 326Ah of CALB LiFePO4 batteries, 1.3kW inv, 310L water, 350-450L diesel.



Guru

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Here's a pic of the internals removed from the old aircon. You can see the sealant in places.

I asked the dealer what they use and he sent me this pic.

 

 



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Guru

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Stick with Sika. Do it once, do it right. Manufactures and repairers work to cost. Thats all.

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Including warranty cost.

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Senior Member

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I ALWAYS contact Sikaflex technical for products to suit my projects. They are extremely helpful. Common questions they ask are what is the construction of the part you intend to adhere/seal ie ABS etc and what is the surface you intend to place it on ie fibreglass etc., will it need to be fixed permanently requiring mechanical removal or do want to remove it relatively easily if necessary in the future.

i usually email their tech dept and on occasion they have called me. Very informative.

 

 



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