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Old 09-06-2019, 02:22 PM   #1
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Butyl tape or caulk?

My 2019 35' sabre 30rlt is needing to be re-caulked. But, the job seems massive and looks like it needs to be done annually living in extreme heat here in FL. Researching this, butyl tape looks to be a great alternative that lasts much longer. I am ok if it doesn't look as clean.

What are your experiences sealing the exterior sides of your rv with butyl tape?

Is it easier to put on than caulk?

Does it last longer?

Can I tape over silicone caulk?

Thank you for your help on this.
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Old 09-06-2019, 02:33 PM   #2
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In my experience butyl tape is only used to bed/seal items that are being installed like windows, etc. Re-doing usually requires removal of the item, laying down new tape, and reinstalling.

I'd opt for caulk after removing as much butyl tape as possible. I have used plastic picnic knives int he past to scrape as much as possible out before caulking with a good urethane caulk.

Also, if you like black streaks, you'll LOVE butyl tape
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Old 09-06-2019, 02:38 PM   #3
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Are you possibly talking about something like Eternabond Tape instead of butyl tape?

Also, NEVER use silicone caulk on an R/V.
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Old 09-06-2019, 02:42 PM   #4
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Yes, it could be eternal bond tape. My dealer put silicone caulk on our rv from the warranty. Just looking for a quick fix vs scrapping all the silicone caulk off the reapplying pro flex.
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Old 09-07-2019, 02:55 PM   #5
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Please read this... I looked at my roof just last week... everything looks fine now going on 4 years... NO caulk needed... once and done... at least for another number of years... yet to be determined.

Roof preventive maintenance
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Old 09-07-2019, 07:55 PM   #6
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Butyl caulk

Quote:
Originally Posted by JeremywFL View Post
My 2019 35' sabre 30rlt is needing to be re-caulked. But, the job seems massive and looks like it needs to be done annually living in extreme heat here in FL. Researching this, butyl tape looks to be a great alternative that lasts much longer. I am ok if it doesn't look as clean.

What are your experiences sealing the exterior sides of your rv with butyl tape?

Is it easier to put on than caulk?

Does it last longer?

Can I tape over silicone caulk?

Thank you for your help on this.
Butyl tape stays sticky forever. You can only use it between two surfaces clamped together. An open patch would become a sticky, dirty mess.

Eternabond (brand name) comes in various widths, up to six inches. If you can span the silicone caulk and get good purchase to bare material for an inch on either side, you can certainly overlay the silicone caulk.

Eternabond weeps a little sticky stuff from the edges. If it's in a prominent place you can run a tiny bead of caulk around the edges of the eternabond.
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