Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit

Which Pipe Sealant?

Bob421Bob421 Member Posts: 5
I am curious which pipe sealant plumbers on this forum prefer when plumbing black iron pipe for use with natural gas,

Thanks, Bob


  • Rich_49Rich_49 Member Posts: 2,540
    Black Iron

    Permabond   LH050
    You didn't get what you didn't pay for and it will never be what you thought it would .
    Langans Plumbing & Heating LLC
    Serving most of New Jersey, Eastern Pa .
    Consultation, Design & Installation anywhere
    Rich McGrath 732-581-3833
  • Bob421Bob421 Member Posts: 5

    write up on Google search. It states that it will even seal a joint which is not fully seated due to positioning. I will have to check my local plumbing supply houses. Thanks for the reply Rich.
  • SWEISWEI Member Posts: 7,356
    I'm learning

    Anaerobic sealants are pretty amazing things.

    Lots of manufacturers, but not really common here other than industrial and fire sprinkler applications.
  • jonny88jonny88 Member Posts: 1,139

    Hercules pro dope.this is my choice for years.
  • MikeL_2MikeL_2 Member Posts: 261
    teflon tape +

    Teflon tape & Megaloc for us........
  • bob youngbob young Member Posts: 2,177
    pipe joint compound

    we use rectorseal, permatex or blue block to name a few favorites
  • ChrisJChrisJ Member Posts: 11,059
    Not a pro

    But I used Hercules Megaloc on all of my gas piping and it worked well.  I didn't use any tape as it seemed to be frowned upon.  So far that is the only dope I've found that I really like.
    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
  • icesailoricesailor Member Posts: 7,265
    Pipe sealant:

    Teflon Tape on everything. Now, only the Blue Monster stuff in the 1/2" x 1429" rolls. You don't loose them as easily. Rectorseal #5 on gas or any of the other kinds that you can't get off your tools or clothes or Rectorseal #100 with Virgin Teflon or MegLoc on potable water. Almost 100% leak proof.

    Heat is Teflon Tape with usually Rectorseal #5.

  • CTheatCTheat Member Posts: 5
    Pipe dope

    Rectorseal true blue. On copper male or female adapters i use blue monster teflon as well
  • SWEISWEI Member Posts: 7,356
    I'll ask again

    Does anyone make 3/8" wide Teflon tape?  I'd love to have it for the small stuff.
  • kevin_58kevin_58 Member Posts: 61
    teflon tape

    I dont know about 3/8but they do make 1/4 in. I think markal makes it, its been a while since i had some. Now that you made me think about it i think i will order a few rolls.
  • SWEISWEI Member Posts: 7,356
    Markal 434-44081

This discussion has been closed.


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