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Old 07-18-2007, 02:55 PM   #1
3 Rivet Member
Devils Lake , North Dakota
Join Date: Mar 2007
Posts: 169
Best Water Heater Sealer

I pulled out the old Atwood and have ordered a new one.

What is the best rim seal when installing the new one?? I autobody many of the side windows I put in used butyl tape. Cheap and effective on windows but the heat from the wtr htr concerns me.


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Old 07-20-2007, 05:36 AM   #2
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Devils Lake , North Dakota
Join Date: Mar 2007
Posts: 169
Has anyone use urethane windsheild adheasive?? I'm thinking that it may be too strong and make removal a pain down the road though.

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Old 01-05-2008, 05:52 AM   #3
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Naples, FL , Hood River, OR
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Posts: 7,306

Allow me to interject a bit here. You guys are going WAY over the top, but I never say no to making something totally bomb-proof. IN fact, I used polyurethane sealant (Sika-Flex 221 which comes in a nice aluminum grey!) to seal the outer mounting flange of my RV-500 when I installed it, but then the interior of this component is 100% accessible for servicing, so just the outer casing is now bonded to the trailer wall.

The 'industry standard' and the process I use in the field, is a product called 'butyl tape'. This is a putty-like substance formed into a tape and is found on a roll at just about any RV supply store. I use it on just about any thru-wall installation like furnaces, water heaters, roof vents, etc.

It makes a nice water-proof seal, is really easy to use and makes the appliance removeable in the event it must be taken out to be serviced. This is the great benefit over sealing it in with polyurethane. Just be sure that you get 'butyl' tape and not the cheaper 'putty tape' which will get hard with age.
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
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