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Old 06-08-2015, 11:33 PM   #1
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1968 30' Sovereign
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Use of Butyl Putty tape

We're working on restoring a 1968 Sovereign, and I'm getting opinions from some DIY friends about the use of Butyl putty tape. I though I'd turn to this forum for some expert opinion about the use of butyl putty.

I need to replace the exterior stove vent, the rooftop refrigerator vent; the existing air conditioner shroud (I'm planning on keeping the working original air conditioner but the shroud has numerous pieces missing); and the two roof fans with Fantastic fans. On the first three, I'm being told that butyl putting tape is the way to go - even though only the refrigerator vent replacement is aluminum and the other two are fiberglass reproduction pieces.

Should I be using butyl putty tape to seat the first 3 pieces or should I be using Tempro 635 or Tempro 644 instead to "seat" and seal the vents and the shroud?

Thanks for any advice or insight you can give!
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Old 06-09-2015, 01:05 AM   #2
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Have a look for Tintins sealants summary, He's got all the info you will need for what you can or should use where :-)
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Old 06-09-2015, 02:40 AM   #3
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Quote:
Originally Posted by cheetah1 View Post
We're working on restoring a 1968 Sovereign, and I'm getting opinions from some DIY friends about the use of Butyl putty tape. I though I'd turn to this forum for some expert opinion about the use of butyl putty.

I need to replace the exterior stove vent, the rooftop refrigerator vent; the existing air conditioner shroud (I'm planning on keeping the working original air conditioner but the shroud has numerous pieces missing); and the two roof fans with Fantastic fans. On the first three, I'm being told that butyl putting tape is the way to go - even though only the refrigerator vent replacement is aluminum and the other two are fiberglass reproduction pieces.

Should I be using butyl putty tape to seat the first 3 pieces or should I be using Tempro 635 or Tempro 644 instead to "seat" and seal the vents and the shroud?

Thanks for any advice or insight you can give!
Only butyl tape as a bedding seal if you ever intend to remove anything you are replacing. Using a polyurethane sealant like Trempro or SikaFlex under a vent will require significant labor if you ever want to remove it again (this stuff DOES happen).

Also, you might look into the Maxx Air fans instead of a Fantastic Vent. They are similar in price, have many more features and have integrated covers that allow for use in the rain WITHOUT those ugly bubble type additional fan covers.

I install the Maxx Air fans 10 to 1 over a Fantastic Vent. Another benefit is maintenance. If you ever have to replace a motor or circuit board, you simply remove 4 screws and the entire fan mechanism lifts off from the roof, leaving the mounting bezel sealed to the roof. It's a simple 10 minute change out!
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Old 06-09-2015, 06:33 AM   #4
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Lew is %100 correct. I've been using butyl tape on my sailboats for many years on items such as stanchions and deck hardware. The ability to remove the bedded item at a later date is important to me. Beware, all Butyl tape is not the same. The crap that is sold to bed your topper, for example, is of poor quality and should not be used to bed/seal on an AS. Check out Compass Marines site to get the appropriate butyl tape. Love the stuff.

>>ron<<
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Old 06-09-2015, 06:44 AM   #5
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I'm about to change out the second Fantastic fan on my 25' with a MaxxAir fan. I did the first one year and also did it on my '07 20'. IMO they are much more versatile fans. One of the best features is that they will ventilate in the rain. I seat them in butyl tape and then seal screw heads and edges with sealer.
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Old 06-09-2015, 12:22 PM   #6
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Agree with Ron and others. Butyl is the way to go & "Bed It Butyl" is the stuff to buy. I have used different kinds on my sailboat and the "Bed It" is the way to go. Also check the Compass Marine blog on bedding hardware technique. The fundamentals are the same. Here is a link to the tape.

***Buy Bed-It Butyl Tape*** Photo Gallery by Compass Marine How To at pbase.com
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Old 06-09-2015, 01:07 PM   #7
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Quote:
Originally Posted by Wayne&Sam View Post
I'm about to change out the second Fantastic fan on my 25' with a MaxxAir fan. I did the first one year and also did it on my '07 20'. IMO they are much more versatile fans. One of the best features is that they will ventilate in the rain. I seat them in butyl tape and then seal screw heads and edges with sealer.
How difficult of a job would this be? Will Airstream install MaxxAir? Thanks for info on them - not ventilating in rain is my only complaint about FF. What other features do you like not on FF? We are fairly new to RV and had not heard about MaxxAir - website has lots of products - which model did you get?
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Old 06-09-2015, 01:35 PM   #8
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The first one I had installed at Jackson Center- I had to supply the fan. That original vent didn't have a fan so I let them run electric to it.

On my 2014 I'm doing them myself. They both have electric already. The replacement is easy- the openings in the roof are the same size so you're not cutting metal. I don't think it took me two hours for the first one, and the was going very slowly and methodically.

Other things I like about the MaxxAir: Remote control, very low and quiet speeds,and it doesn't rattle in the wind.

Mine is the Deluxe Remote 7000K. That's a white cover. 7500K is a smoke cover.
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Old 06-09-2015, 02:45 PM   #9
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Does the MaxxAir have the same warranty as the Fantastic vent ?

My original Fantastic vent is 31 years old and i can get excellent over the phone troubleshooting and parts for no cost (only shipping).

i needed a new motor for a fantastic vent i installed in 2011. Motor was shipped for $15, had fan installed on motor, proper terminals on leads and included a new limit switch.
Hard to switch from a fan with this kind of service.
Mark
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Old 06-09-2015, 03:15 PM   #10
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Don't remember the warranty on FF, but MaxxAir is two years. As I recall FF was sold and new owners are not quite as forgiving on warranty items as the previous were.
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Old 06-09-2015, 03:25 PM   #11
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Butyl is great when used right, as stated above if you ever plan on replacing it makes it easy. Problem on using it with weight pressing down is it's ability to staying soft allows it to squeeze out with pressure. Vertical mounted items apply pressure only with the mounting screws and you can watch it ooze out.
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Old 06-09-2015, 04:07 PM   #12
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FF is now owned by Atwood, just as MaxxAir was purchased by RV Products (Suburban and Coleman)

FF no longer provides parts out of warranty and both have a 2 year new product warranty.


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Old 06-09-2015, 04:11 PM   #13
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got fan motor last week, paperwork was from attwood, only paid shipping.
guess they screwed up ?
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Old 06-09-2015, 05:27 PM   #14
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Butyl is probably the reason most SOB trailers die an early death. Eventually, the tape starts to gap and lets water in. I would use the polyurethane between two surfaces. Dispite all the polyurathane advocates on here, it will not last but a couple years in direct sunlight. If it is between two surfaces, then it will be ok. They best thing I have found for long term UV exposure is LEXEL but it stays gummy and will collect dirt. There is a tape sealant that you put over lap joints that works pretty well.

Perry
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