What Can I Use for Natural Gas Threads? (Explained)

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Yellow Teflon thread tape is the best sealant to use when connecting natural gas pipes. Its flexibility and easy application make it an important component for preventing leaks in gas pipes. Additionally, you can use liquid paste such as Rectorseal that best suits your sealant needs.

Plumbing and heating fittings installation and service close-up

Can I use White Teflon Tapes for Natural Gas Threads?

When connecting any pipe fittings, the threads on the male end and grooves on the female allow you to tighten the connections more precisely. However, the pipe’s content demands that effective thread fittings be employed to prevent leaks.

The piping for gases, for instance, has unique qualities that require sealants that meet standard requirements for effective gas flow. The standards apply to both industrial and residential gas piping applications.

Therefore, the different types of Teflon tape sealant include the white, red, yellow, and green Teflon tapes.

Even though most technicians choose relative shortcuts when preparing their fixtures, it is important to note that all tapes have their standard efficiency for each type of connector when used properly.

Industrial Features of White Teflon Tapes

The following features distinguish White Teflon from other industrial Teflon tapes:

  • Width: 12mm
  • Thickness: 0.1mm
  • Adhesive side: Single-sided
  • Feature: Waterproof, Self-lubricating.

In contrast, these dimensions contradict the specific requirements for sealing gas pipes that require non-adhesive sealant, as well as a wider and thicker sealant than the 0.1 and 12 mm sealant found on the white Teflon pipe.

Therefore, white Teflon is not appropriate for use as a natural gas pipe, thread sealant. Consequently, if applied to natural gas thread applications, the white Teflon tape will lose its adhesiveness after a while because of its gas effect.

As a result, there might be a gas leak from the thread’s tiny spaces; this could lead to dire consequences.

What Can I Use for Natural Gas threads?

Natural gas exhibits several qualities including high density, expansivity, and occupying more space than liquids or solids.

Consequently, this requires a denser tape sealant to counteract the density of these features and to avoid leakage in the little spaces between the threads.

It is the characteristics that make yellow Teflon tape the best tape sealant for gas pipes.

As well as matching gas qualities, yellow Teflon tapes also meet the standards of gas companies in the world; in addition to sealing threads quickly and easily.

Gas pipes are commonly composed of galvanized steel, copper, brass, iron, aluminum, stainless steel, polypropylene, and polyethylene.

Tips for Using Yellow Tape on Natural Gas Threads

  • When making repairs to gas lines in industrial applications, turn off the supply pipes to the point you are making repairs.
  • Make sure that you do not use the yellow tape on any other part of the pipes other than the male threads.
  • A tight grip around the threads will ensure it doesn’t come to lose any time soon
  • The industrial application requires the lighting of all pilot lamps for stoves, fireplaces, furnaces, and the necessary AC and heating equipment. You must do this if you have to turn off the gas at the meter.
  • If you want a reliable seal and an assured grip, tie the tape in the direction of the threads.
  • It’s a good idea not to turn more than three wraps of the tape to ensure that the female groove has enough coverage.
  • Start wrapping from the end of the pipe, ensuring that you cover it to prevent the thread from snagging.
  • For joint threads, tighten the thread 1-2 turns beyond finger tight, but do not overtighten it.

What Is the Best Thread Sealant for Natural Gas?

Using thread sealants at fittings and joints is essential for keeping natural gas pipes leak-free. Although the type and quality of sealants vary from gas company standards and various types, there are some common ones including Liquid sealant and the Thread tape sealant.

Plumber putting a paste sealant.

Liquid Sealant

It is a paste type sealant useful at any temperature without any adverse effects. In addition to Rectorseal paste, you can use many other sealants on the natural gas pipe threads. In addition to being highly effective, it is non-reactive with metal pipes.

How to Use Liquid/Compound Paste Sealant

  • Please read the instructions carefully before deciding on a paste sealant and be sure you pay for exactly what you need.
  • When applying the paste sealant, wear clean gloves, as some compounds might be potentially harmful if touched bare skin.
  • It would be good if you worked in a ventilated area or turned on the fan of your house if applicable so that fresh air is continuously available. It is also advisable to avoid working close to flames since some of these compounds are flammable.
  • If possible, you may want to use sealants made by a Teflon company because of the material’s expansion capacity when wet, which is helpful in tightly securing leaks.

Thread Tape Sealant

Yellow Teflon tape is the most effective thread tape for natural gas, as it is widely used in multiple industrial applications. As compared to other types, it has a higher density and extra thickness, making it ideal for threading natural gas pipes.

How to Use Yellow Thread Tape

When connecting gas pipes, the tape greatly minimizes the risk of leakage if you can maintain the following:

  • Get rid of dirt, grease, and anything else you may have on the male threads and the female grooves.
  • Before winding your tape, check to see whether the threads are running in a clockwise direction. You can consider fitting in the female groove and confirming the direction in which the male thread needs to be turned if you are not able to tell by looking at the threads.
  • Ensure you wrap the male thread end without pulling it off the threads as well as leaving some inch of the tip. When unrolling the tape, pull it tight to ensure a tight fit. Keep the thread clear of any stray bits, as these might restrict the flow of natural gas.
  • It is important to note that if your tape has its threads in a direction opposite to the flow of the threads, the wrapped tape will unwind when screwing the female pipe in.

 Is There a Difference Between White and Yellow Teflon?

Sealants utilize white Teflon for all industrial and residential plumbing, water-pipe applications whereas yellow Teflon has significant utility in sealant applications for gas pipelines.

Among their different features, the colors on them play an equal role in their repair after workers who did not install the pipes change them.

Therefore, the presence of white Teflon will point out that the technician is dealing with water pipes, while the yellow Teflon will indicate that he is dealing with gas pipes.

It prevents any dangers that may arise in the circumstance that a defect remains undetected and the exact content of the pipe cannot be determined immediately.

Other differences between the two types are:

  • White Teflon tapes are much lighter than the yellow tapes that are equivalently heavier. Few wraps of yellow Teflon on a thread would be equivalent to 7 or more of the white tape.
  • White threads make it easier to thread 3/8ʺ pipe fittings, while yellow threads are better for 1/2ʺ gaseous pipe threads.
  • Yellow Teflon tape costs slightly more than white tape due to its more versatile use.


In addition to using yellow Teflon thread tapes to seal natural gas pipe threads, you may use relative liquid pastes. However, these need a guarantee of its effectiveness with no side effects on the natural gas metal pipes.

Be considerate when using your thread tapes. Don’t wrap the threads excessively on the male threads. This often results in unnecessary stress on the grip.

Therefore, it is best to use standard density thread tapes that are not too thin.