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Permatex 80631 Thread Sealant with PTFE is a compact, economical liquid sealant designed for threaded metal fittings. It delivers superior sealing performance across a broad temperature range (-65°F to 300°F) and resists common automotive fluids including oil, diesel, and hydraulic fluids. Trusted by professionals for clean application and long-lasting reliability, it outperforms traditional tapes and pipe dopes, making it the go-to choice for air conditioning, hydraulic, and engine fittings.
| ASIN | B000BKEBT0 |
| Best Sellers Rank | #3,168 in Automotive ( See Top 100 in Automotive ) #13 in Thread Lock Sealers |
| Brand | Permatex |
| Brand Name | Permatex |
| Color | No Color |
| Compatible Material | Threaded Metals |
| Customer Reviews | 4.8 out of 5 stars 2,226 Reviews |
| Global Trade Identification Number | 00686226806314 |
| Included Components | automotive-manual-transmission-seals |
| Item Dimensions | 1 x 3.81 x 8 inches |
| Item Form | Liquid |
| Item Type Name | Permatex 80631 Thread Sealant with PTFE, 1 oz |
| Item Weight | 1.28 ounces |
| Item dimensions L x W x H | 1 x 3.81 x 8 inches |
| Manufacturer | Permatex |
| Material | Polytetrafluoroethylene |
| Material Type | Polytetrafluoroethylene |
| Model | 80631 |
| Number of Items | 1 |
| Part Number | 80631 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Threaded Metals |
| UPC | 686226806314 |
| Unit Count | 1 Ounce |
| Warranty Description | 30 Days |
| Water Resistance Level | Water Resistant |
E**N
4 oz bottle goes a long way!
I absolutely love this stuff. I’ve used this Permatex PTFE thread sealant on two complete vehicle engine builds, and I’m only about halfway through the bottle, which says a lot about both coverage and value. A little goes a long way, and it applies smoothly without making a mess. I used it on cylinder head studs, intake fittings, transmission line fittings, oil cooler fittings, and several other threaded connections exposed to oil, coolant, and transmission fluid. In every case, it sealed exactly as intended—no seepage, no weeping, and no loosening after heat cycles. What I like most is that it seals while still allowing proper torque, unlike some sealants that either over-lubricate or harden too much. It’s held up against coolant, engine oil, and ATF with zero issues. Threads stayed clean, fittings went in smoothly, and nothing backed out during assembly or operation. This has become my go-to thread sealant for engine and drivetrain work. Reliable, efficient, and long-lasting—one bottle easily handles multiple builds. I wouldn’t hesitate to use it again on future projects.
R**R
Great all around thread sealant.
Works great on bolts subjected to petroleum. Oil bolts, intake bolts, and any bolts that needs thread tape.
B**3
It's prematex
Perfect for sealing threads. Works great and easy to clean up. Would buy again when needed.
P**H
Great sealant!
The best thread sealant I have ever used. I've used it in every heavy diesel shop that I have worked in. When it fully dries its fully sealed. A little goes a long way and it lasts for quite awhile.
T**I
On the bottle itself it says not to be used On PVC . Just letting you know.
Although it says not to be used on PVC I used it anyway and it worked great with Teflon tape.
R**N
Ideal para camiones
Nunca había usado este producto me lo recomendó un amigo y funciona muy bien sobre todo para las líneas de aire de los camiones
D**Y
Helpful
Good product
T**N
Best stuff great price
Best stuff
A**R
Too lazy to drive to the orange store
Works as expected
M**L
Super zeug
Sehr ergiebig und hält immer dicht. Besser als jedes PTFE band
H**A
Leakage
The product was fully leaked.. No packaging at all... Worst.. Money wasted
P**L
Quality product
Like most Permatex products it is a quality product. Perfect for air and HVAC fittings.
V**O
Good quality.
Good quality.
Trustpilot
4 days ago
1 month ago