--- product_id: 22934524 title: "Permatex 80631 Thread Sealant with PTFE, 1 oz." price: "£11.08" currency: GBP in_stock: true reviews_count: 13 url: https://www.desertcart.co.uk/products/22934524-permatex-80631-thread-sealant-with-ptfe-1-oz store_origin: GB region: United Kingdom --- # Resists air, oil, diesel & hydraulics Wide temp range -65°F to 300°F Outperforms tapes & dopes Permatex 80631 Thread Sealant with PTFE, 1 oz. **Price:** £11.08 **Availability:** ✅ In Stock ## Summary > 🔧 Seal smarter, build stronger — don’t let leaks slow your flow! ## Quick Answers - **What is this?** Permatex 80631 Thread Sealant with PTFE, 1 oz. - **How much does it cost?** £11.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/22934524-permatex-80631-thread-sealant-with-ptfe-1-oz) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Pros:** Top-rated with 4.8 stars and thousands of reviews, the go-to sealant for serious automotive projects. - • **Temperature Tough:** Remains flexible and reliable from freezing -65°F to scorching 300°F environments. - • **Long-Lasting Value:** One compact 1 oz bottle covers multiple builds—engineered for efficiency and durability. - • **Mess-Free Application:** Smooth, easy spread that won’t over-lubricate or harden, ensuring perfect torque every time. - • **Superior Seal, Zero Leak:** Locks in pressure across air, oil, diesel & hydraulic systems for flawless performance. ## Overview Permatex 80631 Thread Sealant with PTFE is a professional-grade, economical liquid sealant designed for threaded metal fittings. It outperforms traditional tapes and pipe dopes by providing a durable, pressure-resistant seal in air, oil, diesel fuel, and hydraulic systems. With a broad temperature tolerance from -65°F to 300°F, it remains pliable and effective under extreme conditions. Ideal for automotive and industrial applications, this 1 oz compact bottle offers long-lasting coverage and is highly rated by users for reliability and ease of use. ## Description Permatex Thread Sealant with PTFE (Polytetrafluoroethylene) is an economical general-purpose fitting sealant that seals and resists pressure in air, oil, diesel fuel and hydraulic systems, outperforming tapes and pipe dopes. With a temperature range of -65 degrees fahrenheit to 300 degrees fahrenheit it remains pliable at higher and lower temperatures and also resists common shop fluids. Suggested Applications: Air conditioning fittings, temperature sending fittings, hydraulic fittings. Review: 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. Review: Good stuff, careful buying multiple bottles - My 5-stars is for the product itself. Shipping wise.... half of them were opened in the box during transit. One completely emptied inside the box, another halfway, and the other two were trickling out. I got 8, four were fine, four were not. The price is not bad for these size bottles, so I'll likely order again.... just cross your fingers it makes it to you without too much loss. The caps on these bottles come off with about half a turn, since they're so short, it's a single thread keeping the tops on so if you get a few at a time, they will likely shake around and uncap each other. Hopefully whoever packs the products for shipping, keeps them in a more confined box, there was some decent room for all my bottles to move around in which is likely the cause of my mess. ## Features - Economical general-purpose fitting sealant - Outperforms tapes and pipe dopes - Seals and resists pressure in air, oil, diesel fuel and hydraulic systems - Remains pliable at higher and lower temperatures - Suggested Applications: Air conditioning fittings, temperature sending fittings, hydraulic fittings. Flash point: 23.3333 ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.8 out of 5 stars 2,162 Reviews | ## Product Details - **Brand:** Permatex - **Item Weight:** 1.28 ounces - **Item dimensions L x W x H:** 1 x 3.81 x 8 inches - **Material:** Polytetrafluoroethylene - **Style:** Compact ## Images ![Permatex 80631 Thread Sealant with PTFE, 1 oz. - Image 1](https://m.media-amazon.com/images/I/81fYJsNbdWL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: After you applied this product to a pipe thread and placed the nut, do you have to wait, or can you start running the water right away?** A: Depends on how much pressure there is. I know if you put it on a airhose fitting and then pressurize it right away, it won't hold and start to push it out of the threads. I think it takes 24hrs to setup fully. **Q: Use on drinking water systems?** A: Not sure, I used it on air lines outside. I would use Teflon tape on water. **Q: Can one use teflon tape, then apply this product on top of the tape (for water pipe threads)?** A: You would use one or the other, you wouldn't use both... this would take the place of teflon tape. **Q: Can this be used on a high pressured air mattress hose? I need something to seal the threads, but not close off the intake/outtake capacity of hose.** A: Yes, you should be able to use it on air mattress hose, as long as they're threaded and not just push-on type connections ## Customer Reviews ### ⭐⭐⭐⭐⭐ 4 oz bottle goes a long way! *by E***N on December 29, 2025* 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. ### ⭐⭐⭐⭐⭐ Good stuff, careful buying multiple bottles *by C***S on June 27, 2025* My 5-stars is for the product itself. Shipping wise.... half of them were opened in the box during transit. One completely emptied inside the box, another halfway, and the other two were trickling out. I got 8, four were fine, four were not. The price is not bad for these size bottles, so I'll likely order again.... just cross your fingers it makes it to you without too much loss. The caps on these bottles come off with about half a turn, since they're so short, it's a single thread keeping the tops on so if you get a few at a time, they will likely shake around and uncap each other. Hopefully whoever packs the products for shipping, keeps them in a more confined box, there was some decent room for all my bottles to move around in which is likely the cause of my mess. ### ⭐⭐⭐⭐⭐ Makes the job easier *by J***Y on December 28, 2025* What can I say....Permatex is a leader in thread sealant. Works great and used on John Deere mower oil filter change over install. Always a little messy but you get confidence in the finished job. ## Frequently Bought Together - Permatex 80631 Thread Sealant with PTFE, 1 oz. , White - RUXIFEY Single Side 3rd Third Brake Light Seal Gasket Compatible with Silverado GMC 1500 2500HD 3500HD 2014 to 2018 High Mount Stop Lamp Assembly, 2nd Gen - Permatex 80050 Clear RTV Silicone Adhesive Sealant, 3 oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/22934524-permatex-80631-thread-sealant-with-ptfe-1-oz](https://www.desertcart.co.uk/products/22934524-permatex-80631-thread-sealant-with-ptfe-1-oz) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-15*