Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Pipe Dope

ChrisJChrisJ Member Posts: 11,185
A serious question,

What's so great about Megaloc? Why do so many choose it?
I've used it pretty much on everything I've done since 2011 and I have little complaints if any.

But, I started using Loctite 5117 at work and I'm kind of wondering if it may be better for some applications? It doesn't dry but it does become thick and sticky, almost like a gooey glue. I sat a fitting down on a bench with some on it and had a hell of a time getting it (the fitting) off the table a few months later. I suppose in my mind, it seems like it'll stay put in less than perfect threads under pressure where thinner dope may push out. No idea if that even works in the real world or not.

https://www.henkel-adhesives.com/us/en/product/thread-sealants/loctite_5117.html




Also, I see Blue Monster has several dopes as well. Why do some have PTFE and others do not? Is there a downside to PTFE?

Is Megaloc special? Or is dope dope?
What do you use, and why?

All thoughts and comments are welcome.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
«1

Comments

  • SuperTechSuperTech Member Posts: 1,390
    I like the blue monster dope. I prefer using the white teflon dope that EK sells. No need for any tape with it and it can be used on almost anything. 
    ChrisJSTEVEusaPARobert O'Brien
  • EdTheHeaterManEdTheHeaterMan Member Posts: 724
    edited September 9
    Read the label.   There are different pipe joint compounds for different purposes.   Some are good for different fluids and gasses while the one you have may be contra-indicated for some purposes.   Some work with plastic while others don’t.   

    My go to dope is rector-seal #5.  Real messy yellow color. Works with boiler piping, oil burner fittings and gas pipe. I see the gas company guys use Prodope. A gray paste that cleans up easier.   Not so good on Large water pipes on boilers IMO
    ChrisJ
  • EBEBRATT-EdEBEBRATT-Ed Member Posts: 7,223
    I have used that locktite before and it is good although If I remember it gets "stringy" coming out of the container.

    I like Rectorseal "True Blue" works good but tough to get off your hands. Doesn't dry out
    ChrisJ
  • ChrisJChrisJ Member Posts: 11,185
    I have used that locktite before and it is good although If I remember it gets "stringy" coming out of the container. I like Rectorseal "True Blue" works good but tough to get off your hands. Doesn't dry out

    Have you tried Megaloc and if so, what were your thoughts?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • SlamDunkSlamDunk Member Posts: 860
    Never used Mega lock.

    My preferences are Tite -Seal-Medium and Key tite. Both thick, not runny. Dark olive green to blend in. Never seems to dry making separation easier.

    ChrisJ
  • hot_rodhot_rod Member Posts: 13,737
    Like most plumbers I have used all different brands, my current favorites. The stainless specific really works on stainless steel threads. Bad or questionable threads get a few wraps of Blue Monster tape first.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
    ChrisJ
  • Intplm.Intplm. Member Posts: 1,173
    There is all sorts of pipe dope that is used. I have found that it is mostly personal preference.
    I was introduced to this stuff a few years back and have been using almost nothing else. I like it because it works on so many applications. I don't like having to carry around more types of dope because it's just more that takes up space
    etc.
    Try this stuff. You will be hooked. No complaints and no concerns of any sort.
    ChrisJGroundUp
  • EzzyTEzzyT Member Posts: 1,023
    We use Megalock since we have so much of it in stock but also use Gasoila and Teflon Paste.
    Since trying out Gasoila a year ago I’m definitely sold on it.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
    Follow us on Facebook.
    Check us out on Instagram: creative_solutions519
    ChrisJGroundUp
  • ChrisJChrisJ Member Posts: 11,185
    EzzyT said:
    We use Megalock since we have so much of it in stock but also use Gasoila and Teflon Paste.
    Since trying out Gasoila a year ago I’m definitely sold on it.

    What are your dislikes about the Megaloc and how does Gasoila compare?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • Big Ed_4Big Ed_4 Member Posts: 1,403
    Megalock sets hard , and if used with cast , that fitting can not be removed ..
    I have enough experience to know , that I dont know it all
    ChrisJ
  • EzzyTEzzyT Member Posts: 1,023
    @ChrisJ I don’t have any dislikes with Megalock besides it does separate in the can when it sits for awhile. Gasoila sets better and much easier to clean up.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
    Follow us on Facebook.
    Check us out on Instagram: creative_solutions519
    ChrisJ
  • EBEBRATT-EdEBEBRATT-Ed Member Posts: 7,223
    Mega lock does separate a little. I only use it a little bit just didn't care for it not that it was bad I just prefer other brands, Key Tite as @SlamDunk mentioned is also good
    ChrisJ
  • BillyOBillyO Member Posts: 208
    I use Rector T plus 2 on everything. Found it best for all applications
    ChrisJ
  • HomerJSmithHomerJSmith Member Posts: 953
    My idea of a Pipe Dope is, "I cut a pipe three times and it's still too short."
    ChrisJSlamDunkratioIntplm.EdTheHeaterMan
  • hvacfreak2hvacfreak2 Member Posts: 486
    I like Blue Monster as well ( white teflon ). Blue Block after that , although I seem to wear more of it that what actually gets on the pipe .
    hvacfreak

    Mechanical Enthusiast

    Burnham MST 396 , 60 oz gauge , Tigerloop , Firomatic Check Valve , Mcdonnell Miller 67 lwco , Danfoss RA2k TRV's

    Easyio FG20 Controller

    ChrisJSuperTechEdTheHeaterMan
  • GroundUpGroundUp Member Posts: 1,023
    I have an absolute disgust for Megaloc. Always soupy, the brush sucks, the steel can is always smashed and/or rusty and leaks everywhere in the truck, and I've had a lot more leaks with it compared to anything else. Gasoila is top notch in my book with Rectumseal #5 a close second. Have not tried Blue Monster yet, but I hate their tape so my petty side tells me to stick with what I already like. For marred or SS threads like heat exchangers, or steel to copper female joints, I use Loctite 567 anaerobic sealant from a tube. It's spendy and messy, but eventually sets up like concrete. Great stuff for those special joints
  • SuperTechSuperTech Member Posts: 1,390
    I'm glad to see that I'm not the only one who's had a can of Megaloc start leaking and make a disgusting mess out of the truck. My shelves in the van would still look immaculate if it wasn't for that stuff and Spectroline UV dye. The stuff does need to be constantly stirred and it will still be sloppy to work with even after spending half the day stirring it. 
  • jumperjumper Member Posts: 1,502
    With modern chemistry I wonder if we can use some sort of straight threads to connect pipes? Easier to fit if we can turn couplings and nipples to adjust?
  • ChrisJChrisJ Member Posts: 11,185
    edited September 12
    I just did some gas pipe today.

    My first can of Megaloc from 2011 is almost gone.   Its not runny anymore.  But I do use my finger to spread it 90% of the time because the brush just seems to make a mess.

    It is dented in the other side has been since I got it.


    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • SuperTechSuperTech Member Posts: 1,390
    @ChrisJ, perhaps my handling and storage of the Megaloc (and Spectroline dye) is more to blame for the mess in my truck than the quality of the can. I haven't used any since that bad experience. I try to avoid using grrip dope too, it just seems more messy than the alternatives.
  • Intplm.Intplm. Member Posts: 1,173
    I also don't like that all the manufacturers of all pipe dope have a brush applicator that is to short. To short to reach the bottom of the can. Then you bend it strate and it's still to short. This doesn't make any sense.
    EdTheHeaterMan
  • GWGW Member Posts: 3,773
    I like the consistency of this product. I hate true blue, T plus 2 is good but a little too chunky for my taste buds. Rectorseal5 is used on oil stuff. Don’t think I’ve tried mega lock 







    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    www.wilsonph.com
    [email protected]
    Steve Minnich
  • clammyclammy Member Posts: 2,518
    Over all the years for myself I think I ve used n tried them all ,from the beginning pro dope to grip ,grip lite n now it’s usually mega when on hand or real tough on all screwed water steam gas and for oil it’s usually whitlams line of products or the old standard grip . As for tape I ve been using the grey Teflon for a few years .i find it thicker and tends to not rip or tear as u roll it off plus less wraps usually 1 or 2 max . It’s all about what works for you and what your comfortable and confident with using w the least issues .i really don’t miss trying toget grip or grip lite off of stuff like hands ,clothes and just bout everythingitdrips on or touches .peace n good luck clammy
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
    BillyO
  • Robert_25Robert_25 Member Posts: 206
    Grrip is miserable to clean up, but I have never had a fitting leak that was assembled with it.  This week I need to disassemble some fittings that input together 10 years ago with Grrip, so we will see how that goes.
  • jumperjumper Member Posts: 1,502
    Robert_25 said:

    Grrip is miserable to clean up, but I have never had a fitting leak that was assembled with it.  This week I need to disassemble some fittings that input together 10 years ago with Grrip, so we will see how that goes.

    That is real test. Generally sealants don't stop sealing but it is so nice when I can undo decades old joints without a giant wrench.

  • jumperjumper Member Posts: 1,502
    Is the dope market so big that all these brands can exist?
    mattmia2
  • SlamDunkSlamDunk Member Posts: 860
    edited September 12
    For my gas pipe work, I used tite seal. It is rated for pipe fittings, natural gas, gasoline and oil. Probably not for potable water. Goes on like paste, typically used for engine gaskets.

    When I did some minor rework on the gas pipe 25 years later, it was still gummy and pipes twisted apart easily.

    Of course, it isnt sold anymore. Might be the label warning: keep away from children and animals. It smelled like it would taste good.

    Just checked. Now sold as niel seal. $20/can
  • Solid_Fuel_ManSolid_Fuel_Man Member Posts: 2,021
    Another vote for Gasoila. 

    To be honest, I've had excellent luck with just tape on threaded fittings 1.5" and smaller. I've used tape then door for years, but those with tape alone never leak either..... Melrose tape. Blue or gray. 
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • ChrisJChrisJ Member Posts: 11,185
    Another vote for Gasoila. 

    To be honest, I've had excellent luck with just tape on threaded fittings 1.5" and smaller. I've used tape then door for years, but those with tape alone never leak either..... Melrose tape. Blue or gray. 
    On gas / lpg?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • EBEBRATT-EdEBEBRATT-Ed Member Posts: 7,223
    @Robert_25
    Grip is good but makes a mess

    @intplm, when you run out of brush use an acid brush with a longer handle or what I usually do, when you get as much out of the can with the provided brush as you can you make a "can adjustment" smash the top of the can (with the top removed) with the nearest pipe wrench to shorten the can....now the brush will hit the bottom.
    mattmia2CLambIntplm.Alan (California Radiant) Forbes
  • GroundUpGroundUp Member Posts: 1,023

    Another vote for Gasoila. 

    To be honest, I've had excellent luck with just tape on threaded fittings 1.5" and smaller. I've used tape then door for years, but those with tape alone never leak either..... Melrose tape. Blue or gray. 

    I've been doing a lot more tape-only joints lately myself with similar results. Except for the last electric radiant boiler panel I assembled in the shop, one of the 2 steel to male copper joints on the boiler leaked and both brass to copper male joints on the manifolds leaked. After they'd been soldered in place. Had to tear it all apart and try again with Loctite 567, held like a rock as always
  • EdTheHeaterManEdTheHeaterMan Member Posts: 724

    My idea of a Pipe Dope is, "I cut a pipe three times and it's still too short."

    A guy that has a sense of humor. My kind’a dope. Or is it A dope that has a sense of humor. My kind’a guy
    Intplm. said:

    I also don't like that all the manufacturers of all pipe dope have a brush applicator that is to short. To short to reach the bottom of the can. Then you bend it strate and it's still to short. This doesn't make any sense.

    These are multi purpose brushes. Don’t let the name fool you. And they are long enough to get to the bottom of your problems.


    I don’t think you are supposed to eat it!
    GW said:

    I like the consistency of this product. I hate true blue, T plus 2 is good but a little too chunky for my taste buds. Rectorseal5 is used on oil stuff. Don’t think I’ve tried mega lock 

    image
    GWIntplm.
  • ChrisJChrisJ Member Posts: 11,185
    Well my new can of blue monster isn't off to a good relationship.  The can came dented which seems normal but then the brush broke off while I was stirring it.


    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    GroundUp
  • ratioratio Member Posts: 2,545
    If my experience is any indication, that's normal too.
  • ChrisJChrisJ Member Posts: 11,185
    ratio said:
    If my experience is any indication, that's normal too.
    So it's not an indication of a sub par quality but "normal"?   Or normal for blue monster?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • Solid_Fuel_ManSolid_Fuel_Man Member Posts: 2,021
    My brush usually breaks off about half way through Gasoila too..... 

    Honestly, I've had excellent luck with just tape. I've kinda given up on dope, accept for the leakiest looking threads. 3-5 wraps of quality tape has worked very well for me, takes more time than dope though. 

    I air test pretty much all heating installs for s minimum of 24 hours prior to flushing/filling. 
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • ChrisJChrisJ Member Posts: 11,185
    My brush usually breaks off about half way through Gasoila too..... 

    Honestly, I've had excellent luck with just tape. I've kinda given up on dope, accept for the leakiest looking threads. 3-5 wraps of quality tape has worked very well for me, takes more time than dope though. 

    I air test pretty much all heating installs for s minimum of 24 hours prior to flushing/filling. 


    That's the thing though, tape seems like it's more work than dope, no?  Maybe I just need practice but I'm much slower at wrapping than doping.

    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • Solid_Fuel_ManSolid_Fuel_Man Member Posts: 2,021
    Yes, but tape isnt messy, has worked very well for me (tape alone is better than dope alone) just my experience. 

    Frankly, the time really isnt much different. I just hate dopey messes, and leaks more!
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
    ChrisJIntplm.
  • ChrisJChrisJ Member Posts: 11,185
    Yes, but tape isnt messy, has worked very well for me (tape alone is better than dope alone) just my experience. 

    Frankly, the time really isnt much different. I just hate dopey messes, and leaks more!

    You get more leaks with dope?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • mattmia2mattmia2 Member Posts: 1,729
    It seems like any brass that I didn't use tape on seeped a little. Maybe the threads cut in brass have just been terrible for the past 20 years or so.
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!