After researching manufacturer specifications, industry standards, and aggregated owner feedback across dozens of forums and Amazon reviews, we compared the most popular sealants for oil drain plugs. Our evaluation focuses on preventing leaks, ease of use, and compatibility with various oil pan materials. Below are our top picks, each with honest limitations and who should skip them.
| Photo | Product | Score | Buy |
|---|---|---|---|
|
🚗
|
Permatex High Temperature Thread Sealant Best Overall PTFE-based, -65 to 400°F, 50ml tube |
9.0 | 🛒 Check Price |
|
🚗
|
Loctite 567 Thread Sealant Runner Up PTFE paste, -65 to 300°F, 50ml tube |
8.7 | 🛒 Check Price |
|
🚗
|
Fel-Pro OS 30510 Drain Plug Gasket Best Gasket Rubber/metal composite, M12x1.75, 10-pack |
8.4 | 🛒 Check Price |
|
🚗
|
J-B Weld 50112 WaterWeld Epoxy Putty Emergency Fix Epoxy putty, sets in 15 min, cures to 3000 PSI |
7.8 | 🛒 Check Price |
|
🚗
|
VersaChem 13383 Thread Sealant Budget Pick PTFE-based, -50 to 400°F, 1 oz tube |
7.3 | 🛒 Check Price |
|
🚗
|
Gasgacinch 440-B Sealant Specialty Pick Non-hardening, brush-top can, 4 oz |
7.0 | 🛒 Check Price |
 |
Mr. Gasket 2035 Oil Drain Plug Gasket Simple Solution Copper crush washer, 12mm, 5-pack |
6.8 | 🛒 Check Price |
1. Permatex High Temperature Thread Sealant: Best Overall
Permatex High Temperature Thread Sealant is a PTFE-based sealant designed specifically for threaded connections exposed to high heat. In our research, it consistently earned high marks from mechanics for its ability to seal drain plugs on engines that run hot. It remains flexible enough to allow future removal but does not creep or wash out. The brush-in-cap applicator makes it easy to apply a thin, even coat.
However, this sealant requires a curing period of about one hour before adding oil, which can be inconvenient if you are in a hurry. It is also not recommended for use on oxygen systems or certain plastic fittings. If you need a sealant that works immediately, consider a PTFE tape or a gasket-style product instead.
- Withstands high oil temperatures without hardening or cracking
- Seals tapered and straight threads effectively
- Easy to apply with a brush cap, dries to a semi-hard seal
Pros: Excellent high-temperature resistance; Works on both metal and plastic drain plugs
Cons: Requires curing time before oil fill (about 1 hour)
2. Loctite 567 Thread Sealant: Runner Up
Loctite 567 is a PTFE paste that seals instantly and cures to a tough, vibration-resistant seal. Based on owner feedback, it is a favorite among DIYers for its ease of use and reliable performance on drain plugs. It does not require curing time, so you can fill oil immediately after application. The non-drip formula is particularly helpful when working on tight engine bays.
The main limitation is its temperature ceiling of 300°F, which may be insufficient for high-performance or turbocharged engines. Additionally, if you overtighten the plug, the sealant can squeeze out and lose effectiveness. For extreme heat applications, consider the Permatex High Temperature sealant instead.
- Provides a reliable seal on coarse and fine threads
- Resists vibration and thermal cycling
- Non-drip formula stays in place on vertical surfaces
Pros: Instant seal without curing; Works well with aluminum oil pans
Cons: Not recommended for high-torque applications above 300°F
3. Fel-Pro OS 30510 Drain Plug Gasket: Best Gasket
Fel-Pro OS 30510 is a reusable drain plug gasket made from a rubber and metal composite. It provides a clean, dry seal without any messy sealant. We found that many owners appreciate its simplicity: just slide it over the plug, tighten, and you are done. It can be reused several times before needing replacement, making it a great value for those who change their own oil regularly.
However, this gasket is specifically designed for M12x1.75 threaded plugs, which is common on many vehicles but not all. It also may not seal as effectively on plugs with damaged threads or on pans with irregular surfaces. If your drain plug has a different thread size or you need a more forgiving seal, a thread sealant is a better choice.
- Reusable design with a bonded rubber seal
- Simple to install and replace
- Compatible with most standard drain plugs
Pros: No curing or waiting time; Cost-effective for multiple oil changes
Cons: Only fits M12x1.75 threads; not universal
4. J-B Weld 50112 WaterWeld Epoxy Putty: Emergency Fix
J-B Weld WaterWeld is an epoxy putty that can be used as a temporary seal for a damaged drain plug or oil pan. Based on owner reports, it is a lifesaver when you strip the threads or crack the pan during an oil change. It bonds to metal, plastic, and even oily surfaces, and it sets quickly enough to allow you to drive to a shop.
However, this is not a dedicated drain plug sealant. It is meant for emergency repairs and should not be used as a routine sealant because it makes future removal difficult. If you use it on the drain plug itself, you may need to replace the plug afterward. For regular maintenance, choose a proper thread sealant or gasket.
- Can seal stripped threads or cracked oil pans temporarily
- Hardens into a durable, machinable material
- Works underwater and on oily surfaces
Pros: Excellent for emergency repairs; Very strong after full cure
Cons: Not designed for repeated disassembly; Requires mixing and careful application
5. VersaChem 13383 Thread Sealant: Budget Pick
VersaChem 13383 is a budget-friendly PTFE thread sealant that offers decent performance for standard drain plugs. In our analysis of owner feedback, it works well when applied to clean, dry threads and tightened to the correct torque. It withstands typical engine temperatures and resists oil degradation.
However, some users reported that it can leak under high vibration or if the plug is not torqued properly. The tube also tends to dry out if not sealed tightly after use. For a few dollars more, the Permatex or Loctite options provide more consistent reliability. This is best for low-stress applications or as a backup.
- Low cost per application
- Seals effectively on clean threads
- Resists oil and fuel breakdown
Pros: Very affordable; Works well for low-torque applications
Cons: May not hold up under high vibration; Can dry out over time if tube is not sealed
6. Gasgacinch 440-B Sealant: Specialty Pick
Gasgacinch 440-B is a non-hardening sealant that stays flexible, making it ideal for applications where you frequently remove the drain plug. It is popular among vintage car enthusiasts who want a sealant that will not lock the plug in place. It can also be used on other gaskets, adding versatility.
However, because it does not harden, it may not hold up well under high oil pressure or extreme temperatures. Some owners reported minor seepage over time. It also tends to collect dirt if excess is wiped onto the pan. For a more permanent seal, a hardening thread sealant is preferable.
- Remains pliable for easy disassembly
- Can be used on gaskets and threads
- Non-toxic and safe for most metals
Pros: Does not harden, so plugs are easy to remove; Versatile for other sealing tasks
Cons: Not as effective on high-pressure oil systems; Can attract dirt and debris if overapplied
7. Mr. Gasket 2035 Oil Drain Plug Gasket: Simple Solution
Mr. Gasket 2035 is a copper crush washer designed to create a seal between the drain plug and oil pan. It is a simple, no-fuss solution that many OEMs use. Based on owner feedback, it works well when replaced every oil change and tightened to the correct torque specification.
However, these washers are single-use and must be replaced each time. If you reuse them, they are prone to leaking. Copper washers also require careful torque; overtightening can cause them to deform unevenly and leak. For a more reliable and reusable option, consider a rubber gasket or thread sealant.
- Single-use copper gasket for a tight seal
- Universal fit for many 12mm drain plugs
- Very easy to install
Pros: Inexpensive and disposable; Works well on clean threads
Cons: One-time use only; must replace each oil change; Copper can deform and leak if overtightened
Frequently Asked Questions
Do I need sealant on an oil drain plug?
Not always. Many modern drain plugs have a built-in rubber gasket or use a crush washer that seals without additional sealant. However, if your plug has tapered threads, if the gasket is worn, or if you have a persistent leak, a thread sealant can provide extra protection. We recommend checking your vehicle’s service manual first.
Can I use PTFE tape on an oil drain plug?
Yes, but with caution. Standard white PTFE tape is designed for plumbing and may not withstand high temperatures or oil immersion. Use a high-density yellow or pink PTFE tape rated for oil and temperatures above 350°F. Even then, tape can shred and clog oil passages if overapplied. A dedicated thread sealant is generally safer.
How often should I replace the sealant on my drain plug?
It depends on the product. Hardening sealants like Permatex High Temperature can last multiple oil changes if the plug is not disturbed, but once you remove the plug, you should clean off the old sealant and reapply. Gaskets and crush washers should be replaced every oil change for best results.
What happens if I use too much sealant?
Excess sealant can squeeze out and drip into the oil pan, potentially clogging the oil pickup screen or contaminating the oil. It can also make the plug difficult to remove later. Always apply a thin, even layer to the threads, avoiding the first thread near the head of the plug.
Can I use RTV silicone on an oil drain plug?
We do not recommend it. RTV silicone is designed for gaskets, not threads. It can cure into hard chunks that break off and circulate in the oil, causing engine damage. Stick to products specifically labeled as thread sealants or drain plug gaskets.
Our Verdict
After evaluating performance, durability, ease of use, and owner feedback, our top pick is the Permatex High Temperature Thread Sealant for its excellent heat resistance and reliable seal. For a close runner-up, the Loctite 567 Thread Sealant offers instant sealing and great vibration resistance. If you prefer a gasket-style solution, the Fel-Pro OS 30510 is a solid choice for compatible plugs.
