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Old 09-20-2020, 11:13 PM   #1
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Brand: Thor Motor Coach
Model: 2020 Vegas 25.6
State: Montana
Posts: 93
THOR #20220
Help tpo roof caulking

can I used a 15 or 30 year regular white from lowes home depot or need something special?
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Old 09-20-2020, 11:27 PM   #2
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Brand: Still Looking
Model: Newmar Bay Star Sport 300
State: Alabama
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Originally Posted by Scubawise View Post
can I used a 15 or 30 year regular white from lowes home depot or need something special?


I wouldn’t. The specialized recommended product is “self-leveling lap sealant”. Often called “Dicor” - which is a common brand. As the name suggests it flows to some degree on horizontal surfaces (like roofs). It is relatively cheap and readily available and given what you probably paid for your RV why take chances? They also make lap sealant for vertical surfaces like windows and corner seams. I do use urethane caulk on the sides but not silicone. It simply isn’t a first line product anymore. At least not for joints that flex a lot like RVs do.

Also plan to inspect and reseal your roof and sidewalls where needed every 3 or 4 months. No aspect of RV ownership is more important than keeping water out!
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Old 09-21-2020, 08:42 PM   #3
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Brand: Thor Motor Coach
Model: Hurricane 29M
State: Texas
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THOR #11781
Dicor for the roof seams. Easy to use and readily available.
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