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  1. #1
    Join Date
    Mar 2005
    Location
    Pearland Texas
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    UV resistant coating for armaflex

    I installed a new 15 ton condenser and line set in Houston. It failed inspection because the city requires a UV coating on the armaflex. I did some research and there are a few options. What is everyone using?

  2. #2
    Join Date
    Nov 2016
    Location
    Huntsville, Alabama
    Posts
    112
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    My experience stems from solar hot water systems with outdoor plumbing insulation out in the sun. For the best durability you could go with aluminum jacketing for instance from RPR Products.

    google RPR Products Aluminum Roll Jacketing. It comes with a moisture retarder inside to reduce corrosion. Your local industrial insulation supplier should be able to get it.

    I have used flat black paint but it only lasts a couple of years and must be repainted. Some solar installers use wide aluminum tape and run multiple pieces lengthwise to cover the insulation. Ive seen electricians tape used but I wouldn't advise that.

  3. #3
    Join Date
    Nov 2016
    Location
    Huntsville, Alabama
    Posts
    112
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    What about one of those chases that look like downspout? That hardware is made especially for the HVAC industry I thought.

  4. #4
    Join Date
    Mar 2005
    Location
    Pearland Texas
    Posts
    385
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    Thread Starter
    The condenser is sitting on a flat roof. The line set is supported by 4x4's with clamps on unistrut. It will have to be some kind of tape, paint or aluminum.

  5. #5
    Join Date
    Jan 2010
    Location
    Central Texas
    Posts
    212
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    They sell an Aluminum Oxide Paint at most supply warehouses. I picked up a gallon from United Refrigeration not to long ago.

  6. #6
    Join Date
    Nov 2016
    Location
    Huntsville, Alabama
    Posts
    112
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    Hey AL2O3 paint sounds good but it might still need to be repainted every two years or so. If you'll be servicing this equipment once a year then go for the paint.

  7. #7
    Join Date
    Feb 2016
    Location
    Florida
    Posts
    529
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    They make the white plastic covering with elbows and whatever.

  8. #8
    Join Date
    Jun 2012
    Location
    Northern NV
    Posts
    1,339
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    I generally use a elastomeric roof coating from Henry or Gardner. Just brush on liberally, lasts 3-5 years. Looks good too.

  9. #9
    Join Date
    Apr 2010
    Location
    Texas
    Posts
    614
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    United sells the white UV paint that you're supposed to use for this, but... damn, its spendy. Last time I just popped in for a gallon, and didn't even look at the price. At a price very near a dollar an ounce, I'd be more inclined next time to just paint the insulation with some white latex house paint. I bet the inspector couldn't spot the difference.


  10. #10
    Join Date
    May 2006
    Posts
    3,322
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    Would the cost savings be worth it if you got fined for not using the correct product ?
    i would rather pay the extra cost and do it right

  11. #11
    Join Date
    Jul 2000
    Location
    Cuenca EC
    Posts
    13,307
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    I used this back in Florida and it withstood the sun for years with no problem. They recommends re-coating once every year or two, but I found that to be unnecessary:

    Armaflex WB Finish - UV Resistant Coating

    Check out Icemeister's Back Room

    Read My Latest Rambling:
    What Is Mechanical Subcooling?

    ...and a new calculator:
    Nitrogen Pressure Calculator

  12. #12
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    3,223
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    Quote Originally Posted by icemeister View Post
    I used this back in Florida and it withstood the sun for years with no problem. They recommends re-coating once every year or two, but I found that to be unnecessary:

    Armaflex WB Finish - UV Resistant Coating
    "Site can't be reached"

    That's probably what I tried to find. It's made by the people who make Armaflex, specifically for that. But every result I've tried so far has been "site can't be reached". At least, for me and my computer.

  13. #13
    Join Date
    Apr 2017
    Location
    Houston, Tx
    Posts
    487
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    how much more time does it take to apply aluminum or pvc lagging verses painting?

    seems like the lagging might be faster?

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