Best Pipe Thread Sealant – Buyer’s Guide

If you look in the toolbox of any plumber or repair professional you are sure to find some form of sealant for the pipe. Various forms of sealants exist for various occupations. Potentially, using the wrong sealant can potentially lead to leakage, water damage, and other serious issues. Pipe sealants, also known as pipe joint additives, as the name implies, seal threaded pipe fittings and block the path of leakage along the tube. But how would you know what’s the best pipe thread sealant?

What Is The Best Pipe Thread Sealant?

Oatey 31230 Pipe Joint Compound with PTFE with Brush, 4...
Loctite 209741 Heavy Duty Threadlocker, 0.2 oz, Red 271, 0.2
DANCO Waterproof Silicone Faucet Grease | Silicone Sealant |...
Rectorseal 23631 1/4 Pint Brush Top T Plus 2 Pipe Thread Sealant
Amazing GOOP 150011 Plumbing Adhesive - 3.7 fl. oz.
Gasoila Soft-Set Pipe Thread Sealant with PTFE Paste, Non Toxic,...
-
Approved for use on Flowguard Gold, Blazemaster, and Corzan piping systems. Non-toxic, non-staining formula. Allows for easy disassembly without stripping or damaging threads.
Heavy duty. High strength formula. Compatible to powerful equipments. Moisture resistant.
Resistant to most harsh chemicals. Contains high raw silicone content. 95% silicone. Odorless and colorless.
For use with potable water (hot or cold). Lead-free and contains no other metals. Lubricates and protects threads. Formulated for plastic and metal pipe.
Flexible when cured. Submersible. Does not become brittle. Dries clear. Manufactured In United States.
Strong sealant. Lock air efficiency. Easy to apply and peel off. Pressure range is 10,000 psi.
Editor's Choice
Oatey 31230 Pipe Joint Compound with PTFE with Brush, 4...
Approved for use on Flowguard Gold, Blazemaster, and Corzan piping systems. Non-toxic, non-staining formula. Allows for easy disassembly without stripping or damaging threads.
Amazon's Choice
Loctite 209741 Heavy Duty Threadlocker, 0.2 oz, Red 271, 0.2
Heavy duty. High strength formula. Compatible to powerful equipments. Moisture resistant.
#1 Best Seller
DANCO Waterproof Silicone Faucet Grease | Silicone Sealant |...
Resistant to most harsh chemicals. Contains high raw silicone content. 95% silicone. Odorless and colorless.
Best Non-Hardening
Rectorseal 23631 1/4 Pint Brush Top T Plus 2 Pipe Thread Sealant
For use with potable water (hot or cold). Lead-free and contains no other metals. Lubricates and protects threads. Formulated for plastic and metal pipe.
Best for Elevated Temperatures
Amazing GOOP 150011 Plumbing Adhesive - 3.7 fl. oz.
Flexible when cured. Submersible. Does not become brittle. Dries clear. Manufactured In United States.
Best for Oil Plumbings
Gasoila Soft-Set Pipe Thread Sealant with PTFE Paste, Non Toxic,...
-
Strong sealant. Lock air efficiency. Easy to apply and peel off. Pressure range is 10,000 psi.

Paid Links / Last update on 2020-10-16

pipe thread sealant

1. Oatey 31230 Pipe Joint Compound with PTFE with Brush – Editor’s Choice

Oatey 31230 Pipe Joint Compound with PTFE with Brush, 4...
  • Adhesives & Sealants
  • Country of manufacture: United...

Paid Links / Last update on 2020-10-16

This pipe sealant has a non-hardening, soft set composition so it provides excellent properties in sealing and assembling properties. Its formulation can also withstand up to 3,000 PSI for gases, and 10,000 PSI for liquids with available thermal capacities of -50 to 400 Fahrenheit for glasses, and -50 “to 500 Fahrenheit for liquids.

Threaded Link Capable Formulation

This compound sealant is intended to seal threaded links due to internal pressure against leakage. It allows tighter attachment with lower torque, stable permanent sealing of all threaded connections, and allows quick disassembly without threads being stripped or harmed.

Pipe Versatile Application

This sealant can be used on threads made of plastic or metal to lubricate and seal all threaded joints without hardening or separation. This product can also support pipe materials like PVC, CPVC, ABS and cyclic, polypropylene, copper, and stainless steel.

Overall

Oatey Pipe Joint Compound might be the best overall pipe thread sealant, it has an impressive formulation that can adhere to multiple pipe materials including steel. Plus the packaging includes an applicator, so you will no longer think about how you will apply it.

Pros
  • Approved for use on Flowguard Gold, Blazemaster, and Corzan piping systems
  • Brush top applicator included
  • Non-toxic, non-staining formula
  • Allows for easy disassembly without stripping or damaging threads
Cons
  • Messy to use

2. Loctite 209741 Heavy Duty Threadlocker – Amazon’s Choice

Sale
Loctite 209741 Heavy Duty Threadlocker, 0.2 oz, Red 271, 0.2
  • Heavy-duty adhesive...
  • Designed for larger metal...

Paid Links / Last update on 2020-10-16

The Loctite Threadlocker Red 271 is constructed to securely lock and seal the threaded fasteners and avoid vibration loosening. It is suitable for fittings up to 1 “(25 mm), with a special solution that is perfect for valve covers, water pumps, and alternators for generators, machinery, and automobiles.

Resistant to Moisture

The Loctite Threadlocker Red 271 is resistant to moisture and prevents threads from rotting, rusting, and degradation while reducing the need to store nuts and washers on costly locks. This can be conveniently set up for 10 minutes in 24 hours easily.

Pure Sealant

This is a pure sealant and no additives or fillers are used to create this sealant. Any type of pollutants, unwanted particles, or additives are harmful to fittings as they clog and damage the components. But this sealant assures its user that its formulation does not contain these contaminants.

Overall

The Loctite Threadlocker Red is the most versatile pipe sealant out there, you will find yourself in need of this product with multiple application possibilities, even on automotive and heavy machinery materials. However, this product might not last long compared to other sealants.

Pros
  • Heavy duty
  • High strength formula
  • Compatible to powerful equipments
Cons
  • It might not be able to last long

3. DANCO Waterproof Silicone Faucet Grease | Silicone Sealant – #1 Best Seller

DANCO Waterproof Silicone Faucet Grease | Silicone Sealant |...
  • PLUMBERS FAUCET AND VALVE...
  • LUBRICANT GREASE Contains high...

Paid Links / Last update on 2020-10-16

The Danco Waterproof Silicone Sealant Grease is perfect when fixing a leaky faucet for lubricating faucet ends, valves, and cartridges. The Faucet and Valve Grease plumbers help to minimize pressure. It contains high raw silicone content which makes it better for long-term lubricant hold and offers long-lasting lubrication that helps to function smoothly with hard-turning faucets specifically.

FDA Approved Formulation

This sealant is approved for use in NSF 61 and meets the required specifications of FDA Regulation 21. It works well in temperatures from -40 ° to 400 ° F and can be designed for many purposes in plumbing and household.

Acts as a Waterproof Lubricant

This Silicone Faucet Grease is resistant to water and oxidation and can be used on ceramic stems. It is intended for use on roofs, valve ends, cartridges as a waterproof lubricant and is suitable for nitrile/rubber O-rings, which helps minimize friction and provides long-lasting lubrication.

Overall

The Danco Waterproof Silicone Sealant Grease is a wonder mostly for plumbing valves and plumbing systems for faucets and sinks. It is FDA approved and acts as a water lubricant for multiple sealing applications. Plus, it’s resistant to water which is a factor that you might want to consider when buying a pipe sealant.

Pros
  • Resistant to most harsh chemicals
  • Contains high raw silicone content
  • 95% silicone
Cons
  • Runny viscosity

4. Rectorseal 23631 1/4 Pint Brush Top T Plus 2 Pipe Thread Sealant – Best Non-Hardening Pipe Sealant

Paid Links / Last update on 2020-10-16

The Sealant Rectorseal 23631 1/4 T Plus 2 Pipe Thread is made from Synthetic Fibers and Teflon that are spread in a resinous base combined with inert mineral fillers, making it a better thread sealant. Besides using it on the fittings of the compressor, it can be used on pipes or joints where gas, refrigerants, fuels, water, oil flow, and many more.

Non-Hardening Sealant

This is a non-hardening sealant to the thread. Aside from Teflon & Synthetic Fibers, it has PTFE which makes it solid and non-hard so that the sealant can be easily added or peeled off. The Thread sealant’s friction coefficient is very low having it give a stronger joint.

Resinous Base Fibers

The inert mineral fillers are mixed with a resinous base and the fibers of this sealant are distributed in its formulation so the best sealing output possible is offered in the table. It is also excellent for service which needs immediate pressure.

Overall

This sealant is proven to be the best non-hardening pipe thread sealant out there because of its formulation. It has a resinous base that allows a maximum sealing capability. It also has multiple features that are a smart choice to consider when looking for a pipe sealant.

Pros
  • For use with potable water (hot or cold)
  • Lead-free and contains no other metals
  • Lubricates and protects threads
  • Formulated for plastic and metal pipe
Cons
  • Cannot seal gasket

5. Amazing GOOP 150011 Plumbing Adhesive – Best for Elevated Temperatures

Amazing GOOP 150011 Plumbing Adhesive - 3.7 fl. oz.
  • This Item Is Eclectic Products...
  • Used For Hardware,Glue...

Paid Links / Last update on 2020-10-16

Amazing Goop Plumbing Multi-Purpose Adhesive is a super adhesive/sealant that covers leaky pipes, downpipes, seams for the gutter, and ceramics fittings. It creates a watertight bond stronger on PVC tubing than silicone, pool tiles, garden hoses that dry clear effectively.

Optimum Fitting Reliable

The sealant provides optimum fitting of reliability, appearance, and OE-style in control parts for aftermarket emissions. It is suitable for the efficient sealing of exhaust joints and other sections that are subject to high temperatures. The sealant is also suitable for pipe and out-of-round muffler attachments.

Elevated Temperature Handling Capabilities

This sealant can handle elevated temperatures and cures after treatment in just a few minutes. It assists in ensuring successful exhaust system repairs. The sealant is often designed as a link leak adhesive but not to replace welding or clamping mufflers.

Overall

Amazing GOOP Plumbing Adhesive might be the best choice when you are looking for a pipe thread sealant that can withstand elevated temperatures. It is suitable for most pipe and muff applications. Overall, its flexibility and versatility is a good choice to consider.

Pros
  • Flexible when cured
  • Submersible
  • Does not become brittle
  • Dries clear
Cons
  • Not for cooling system

6. Gasoila Soft-Set Pipe Thread Sealant with PTFE Paste – Best for Oil Plumbings

Gasoila Soft-Set Pipe Thread Sealant with PTFE Paste, Non Toxic,...
  • Non-hardening, non-toxic paste...
  • Use on threaded brass, copper,...

Paid Links / Last update on 2020-10-16

The Gasoila Soft-Set Pipe Thread Sealant is a non-invasive, non-toxic, and non-hardening form compound sealant consisting of polytetrafluoroethylene ( PTFE). This powerful sealant will seal fittings made from various materials like copper, brass, bronze, stainless steel, glass, polyethylene, polypropylene, ABS, polybutylene, PVC, nylon, and more.

Temperature Versatile

This sealant can stay permeable at colder temperatures, and it also functions up to 600 degrees Fahrenheit that can withstand airflow pressure of up to 3000 PSI. The formula also serves as an assembly lubricant to help avoid corrosion of components when subjected to different temperatures.

Oil Resistance

The sealant has outstanding gasoline resistance like E10 and E85, petroleum solvents, kerosene fuel oil, biodiesel propane, butane, liquefied petroleum gas, cutting oils, ammonia, aliphatic solvents, acids, and steam.

Overall

Gasoila Soft-Set Pipe Thread Sealant might be the strongest sealant especially on gas and oil plumbings, it has an excellent formula that adds features enabling oil resistance. However, you have to be cautious not to include this in your oxygen flow plumbing.

Pros
  • Strong sealant
  • Lock air efficiency
  • Easy to apply and peel off
Cons
  • Not suitable for oxygen flow
gasoila

7. Permatex 24200 Medium Strength Threadlocker Blue – Best All-Rounder

Paid Links / Last update on 2020-10-16

Permatex Medium Strength Threadlocker Blue Formula is an all-purpose threadlocker suitable for 6 mm to 20 mm products with both nut and bolt systems. This threadlocker seals and locks, preventing the weakening of parts due to vibration eliminating the need to store costly lock nuts and lock washers. It also prevents threads against rust and is removable for quick disassembly with basic tools.

Anaerobic Formulation

Threadlockers are anaerobic products which means they cure only in the absence of air and active metal. It not only seals air from the fitting of an air compressor but also prevents oil leakage, hydraulic pump, diesel fuel, and other devices where these fluids flow.

General Purpose Application

This sealant is a general-purpose coating for traditional lock washers, nylon inserts, and other mechanical devices as it secures the entire fastener structure from weakening from shock and vibration by filling the gap between threaded metal components, curing it to form a rigid, adhesive bond and seal.

Overall

Permatex Medium Strength Threadlocker is an allrounder pipe thread sealant, suitable for multiple general-purpose application. It has an anaerobic formulation that will have additional support to your adhesion.

Pros
  • Suitable for air and liquid flow
  • Easy to use
  • Versatile in temperature
Cons
  • Long cure and dry time

FAQ

What is a pipe thread sealant?

A pipe thread sealant is a substance used to close the openings among connections between pipe threads. Pipes that are connected using threads generally create gaps between them which enable the escape of liquid or gas. It’s the responsibility of the sealant to ensure the gap is securely closed to avoid any leakage.

How to use pipe thread sealant?

Push two or three times across the fitting, then push the tape close to cut it off. Cover the fibers with paste-type pipe coating on metal trimmed fittings often called pipe dope. Brush the sealant all the way around the fitting onto the threads then mount the joint.

Is pipe thread sealant permanent?

A pipe joint sealant also called pipe glue, pipe dope, or PVC glue is a white or transparent, plastic-like adhesive. Pipe dope is usually stronger than Teflon tape, which is why plumbers and other professionals use it instead of banding for permanent seals. So, it is safe to say that it’s more permanent than a tape.

Is pipe thread sealant better than Teflon tape?

Pipe thread sealant is easy to find, reasonably user friendly, and affordable. It works for all pipe and fitting materials styles and creates a good seal. The pipe sealant is usually stronger than the Teflon tape.

Is pipe thread sealant the same as plumbers putty?

Both sealants are extremely durable when it comes to fittings for the bathroom and various drain pipes. But the putty of plumbers is delicate as opposed to the caulk of silicone. This is the reason why the quality of silicone is less than the putty of a plumber.

Buyer’s Guide

The first thing you have to know is the process. Pipe thread sealants are easy to add and be applied. Everything you need to do is apply the adhesive on the threaded portion of the fittings using a brush. Make enough of a layer thick and then lock the fittings. So let the paste dry after that. You’ll have a completely sealed flow-line ready when it’s dry. Application is easier than tape sealant but it takes time to dry.
Then, consider which form of sealant you want to purchase. Find out the material used to produce the sealant. The best material for a thread sealant for air compressors is PTFE or polytetrafluoroethylene. A thread sealant should be able to withstand high temperatures since the air passing through it may have high temperatures. So, choose a sealant with a maximum temperature range of 500 F or more.
Lastly, you have to really know what you are using the sealant for, so you will have the correct product, where we listed 7 above that might help you decide.