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Thread: Bathroom Exhaust Fan Replacement
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08-21-2018, 07:29 AM #11
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Well darn--I guess I assumed whatever was needed to mount it would come with the fan.
I just skimmed the installation instructions (https://www.airxcel.com/docs/default....pdf?sfvrsn=11) and it comes with screws--looks like I'll just need the BUTYL tape. I'll wait for the fan to arrive and then go from there. Thanks!
Amen to that!2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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08-21-2018, 07:38 AM #12
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Called my dealership (Campers Inn in Macon, GA) and they said to use the Dicor Self-Leveling sealant and to use the butyl tape is specified in the MaxxAir instructions. I think I'm ready. Thanks everyone.
2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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08-21-2018, 10:06 AM #13
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I set the fan in the roof opening and then checked it inside to see it was centered in the opening so the interior trim ring fits evenly before I drilled & screwed down the fan on the roof.
Rubbing back the old sealant is hard on the fingers.
Invested in a gallon of PPG SX330 Wax & Grease Rmover from the auto paint store, it cleans butyl tape residue off easily from the TPO.
The good butyl tape is really, really sticky.
Switched to using eternabond tape where possible as I didn't like how both Super Flex & Dicor self leveling sealants' solvents (Toluene, Heptane in Superflex & Naphtha, Light Aliphatic in Dicor) pucker/blister my TPO and lift it from the roof. It does settle back down after days.
Dicor link about cosmetic distortion of some TPO: https://dicorproducts.com/62/
Gene- Gene
Kim & Gene
2015 Reflection 317RST
2017 Ram 3500 CC LB 4x2 6.7 CTD AISIN 3.73 DRW Auto Level Rear Air, BD3, Prodigy P3, Aux Tank
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08-21-2018, 01:37 PM #14
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08-22-2018, 06:16 PM #15
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Heptane vs Naphtha
I looked up the MSDS on the Dicor and Alpha sealants. Dicor's 501LSW Self-Leveling Lap Sealant's primary ingredient is heptane. Alpha 1010's primary ingredient is naphtha. I tried to figure out the difference to put it in layman's terms, but all I found was way beyond my level of comprehension.
1021, Alpha's self-leveling sealant, is also made of heptane .
According to the Reflection manual the roof is made by Alpha Systems. The manual is very specific: Clean all areas to be resealed with a non-abrasive household cleaner, such as Top Job or Spic-N-Span, using a medium-bristled scrub brush. This area must be dry before continuing. Solvents should not be used during cleaning. Solvents can damage existing sealants and may weaken plastic roof components. Apply a generous amount of Alpha Systems 1010 Non-Sag Sealant over top of any existing sealant needing resealed. Please note ONLY ALPHA SUPPLIED SEALANTS SHOULD COME IN CONTACT WITH THE SUPERFLEX ROOF MEMBRANE.
I sent a message to Alpha to see if I can use the 1021 self-leveling sealant or if I must use the 1010. While I appreciate everyone's input and acknowledge my dealer's experience, I want to hear it directly from the manufacturer--I don't want to mess up my roof. I'll report back what Alpha says to my inquiry.2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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08-22-2018, 06:22 PM #16
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Sx330 msds
I found it very interesting that SX330 is made from heptane and naphtha--the same materials in the Dicor and Alpha sealants.
2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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08-22-2018, 10:12 PM #17
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The Alpha sealants are not that hard to find. Got them at Camping World. I used them on my roof to touch things up and it works fine. The new sealant was a lighter tan than the old but I believe that's due to oxidation of the surface. I used the self leveling on horizontal surfaces and non sag on verticals.
I used these products because of the statement in the manual. The roof material has a 12 year warranty, why give 'em a reason to void it?
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08-22-2018, 10:40 PM #18
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I don't think the sealants are damaging the TPO, but does pucker it up for awhile.
The piece of TPO I tested (after seeing the TPO on the roof react to Super Flex self leveling that I got from CW), is excess TPO from below the roof tucked down around the fan trim.
It hasn't been cleaned or exposed to weather.
Right after putting Alpha 1021 self leveling applied can see the backside puckered where the sealant is.
Now a couple months later, same backside of the TPO piece.
I'd mentioned Dicor b/c I tested the other end of the test TPO strip, saw the same puckering.- Gene
Kim & Gene
2015 Reflection 317RST
2017 Ram 3500 CC LB 4x2 6.7 CTD AISIN 3.73 DRW Auto Level Rear Air, BD3, Prodigy P3, Aux Tank
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08-23-2018, 10:10 AM #19
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The Answer is In!
Yvonne Christian from Alpha Systems replied to my inquiry and said either the 1010 (non-sag) or 1021 (self-leveling version) is acceptable to use on my roof. Therefore I don't think it's a stretch to come to the conclusion that the Dicor is also OK, too, since it is made from the same base chemical, at least according to the MSDS.
2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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08-23-2018, 10:31 AM #20
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The GD Repair Center said I could use Dicor on the TPO roof.
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