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Thread: "Leak Sealant"

  1. #1
    Join Date
    Apr 2011
    Location
    michigan
    Posts
    172

    "Leak Sealant"

    Has anyone used any of the leak fix in a bottle for a/c systems. I see they have them for automotive a/c as well as residential/commercial systems. Looks like a glue you put in the system when adding refrigerant. I cant imagine they work or last. I dont see how it wouldnt plug up a cap tube or piston, or gum up a txv. Just curious to see if anyone used any of these leak repairs to see what the results were. I intend to keep brazing any leak I can or replace the component that is leaking.

  2. #2
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    962
    this is a debate that will go one for ever..but i think the overall feeling here is this stuff Sucks.

    find the leak and fix it. I only would use it, when i have a new unit on the way and i may want to buy me a few weeks or months. But only when the customer begs...I really really don't like to use it....IF you do, make sure you write on the condensor that you pumped BS into the system so the next tech that comes out doesn't ruin his equipment.

  3. #3
    Join Date
    Apr 2011
    Location
    michigan
    Posts
    172
    Thanks for the info. I agree find the leak and fix it. We work hard to be sure the system is as clean and contaminant free as we possibly can why on earth do we want to put some kind of sludge into our nice clean system?? The "Easy" path is not always the right one to take. I would be seriously pissed if I ran that junk through my recovery unit. I have never used the stuff, just see it advertised all over.

  4. #4
    Join Date
    Jun 2012
    Location
    East tx
    Posts
    164
    I just recently used a leak stop substance as well as leak dye for the first time..ive always been against putting foreign substances in a system. But this is on a 30+ yr old evap that a company retrofitted to 410a. Evap leaking at almost all welds. New coils are being built but i used the leak stop to slow down the amount of freon having to be put in system to keep it running..it's helped sone but not alot. Still don't want to make a habit using the stuff though

  5. #5
    Join Date
    Jun 2012
    Location
    Texas Hill Country
    Posts
    53
    I've never had any real luck with leak stop products. Some of them smell kind of good, but that's about it.

  6. #6
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,403
    Quote Originally Posted by Toddbrewster View Post
    I see they have them for automotive a/c as well as residential/commercial systems.
    They work differently.

    The automotive stuff is designed to swell leaking hoses and gaskets. The residential/commercial stuff is designed to harden with exposure to air/moisture to seal leaks in metal.

  7. #7
    Join Date
    Dec 2002
    Location
    Georgia
    Posts
    30
    I put a can in a piece of junk portable A/C just for the heck of it and it did seal the leak and it's still running.
    I wouldn't put it anything important . JMO

  8. #8
    Join Date
    Jun 2010
    Location
    jersey
    Posts
    107

    Thumbs down

    .i fllow behind a "service tech" at my company.. hes uses it for everything and charges alot too... then .. it doesnt work ... boss sells them new system ayway.. so when i go do the rip out ... i cut the lines and the part of the line clostest to txv/piston, is full of oil....

    and that stuff smells like it should be used on dead bodies..

  9. #9
    Join Date
    May 2005
    Location
    South
    Posts
    580
    I did a maintenance on a heat pump package unit. It was in a 55+ community and the owners kids do a/c up north and put it in about 8 years ago (thats what he said).

    When I connected my gauges they read zero, I was able to replace the schraeder valves with a regular (unvalved) tool. After that I got pressure reading and they were normal. TXV worked, reversing valve worked.

    I don't recommend putting it in anything simply because it's not a proper repair. In fact I will refuse to put it in anything. We had a guy call up and say he just wants us to put xxxx brand leak stop in his rental. I got the ticket and did the install. The next day he called back and it wasn't working at all now. A few days later he said he was having another company put a new system in because we screwed it up. Pure BS.

  10. #10
    Join Date
    May 2011
    Location
    Washington, DC
    Posts
    972
    Coincidentally, I also started another thread on this same subject today. I also confirmed today with both trane and carrier, if this stuff or dye is found in a system, it voids any warranty.

    My boss (who doesn't even know ac) is pushing guys to use this. I can only assume because of the quick, and large profit margin. I'm also finding that the techs who believe in doing things right, are against it. The techs who just want to hurry up and get home, are in support of it, not surprisingly. Personally, I do feel only to things belong in the system, refrigerant and oil.
    Ron

  11. #11
    Hello,I'm in apartment maint,I've used HVAC-R fix a flat in my 2 ton units and it does very well.It costs 48 dollars.If the leak is to big you replace. But have saved the company thousands of dollars.It has not clogged a meter device or cap tubes.

  12. #12
    I don't recomend it for residential jobs and then charge the people the same price as replacing the evap coil or the condenser unit.That would be dishonest.In apartment maint you have limited time so sometimes in this bussiness it pays to try new things.

  13. #13
    Make sure you check your evap coil for good airflow or you could over charge the system.A man paid 100 dollars just to pull a secondary filter from under his air handler. He had a 30 year ac man doing his unit and never took the old filter out for 7 years. Pressure was low and icing up=clogged filter!! Same goes for condenser coils.

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