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Old 11-14-2012, 03:18 PM   #1
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Front Window Caulking

Hi We've got a 378TS ( probably doesn't matter) purchased last year. I occasionaly apply UV protectant to all the exterior rubber and happened to notice the caulking on the top of the front window between window gasket and motorhome has cracked ( assume from driving vibration and/or exposure to elements)
Wondering if anyone out there has run accross this and can tell me what caulking to get ( specialized for RV use or household ? and I assume rubber based ?) and any application tips ( applying over existing caulking fine or removal of original way to go)

Thanks -
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Old 11-15-2012, 10:29 PM   #2
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Quote:
Originally Posted by Nomore9-5 View Post
Hi We've got a 378TS ( probably doesn't matter) purchased last year. I occasionaly apply UV protectant to all the exterior rubber and happened to notice the caulking on the top of the front window between window gasket and motorhome has cracked ( assume from driving vibration and/or exposure to elements)
Wondering if anyone out there has run accross this and can tell me what caulking to get ( specialized for RV use or household ? and I assume rubber based ?) and any application tips ( applying over existing caulking fine or removal of original way to go)

Thanks -
Normally that window is installed with a Fiberglass to gasket to glass fit. There souldn't really be caulking because like yours it will crack. I'd consult a glass shop that works buses?, for advice. You don't want a leak to the interior because of this joint.
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Old 11-16-2012, 12:26 AM   #3
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Windows in most motorhomes with fiberglass sides use Butyl tape to adhere the window frame to the exterior panel and form a water-tight seal. On RV's with aluminum sidiing, the Butyl tape is used, and then once the window is fastened a bead of Silicone is used across the top of the window to help keep water out since the siding is not flat.

Sometimes this Butyl tape will look cracked as the portion exposed to the elements dries out, but the seal may still be good. Maybe post a picture of the cracking for some of us too look at so we can give you better opinions.
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Old 11-16-2012, 07:29 PM   #4
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Thank you guys for responding. I took a picture of what was going on with my I-pad . However I'm not having including pic as attachment - may be something about forum website I haven't figured out .
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