--- product_id: 30694019 title: "Permatex 56521 High Performance Thread Sealant, 50 ml" price: "€ 27.93" currency: EUR in_stock: true url: https://www.desertcart.ie/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml store_origin: IE region: Ireland --- # Temp resistant -60°F to 300°F Seals up to 1,000 PSI Rapid cure, withstands 10,000 PSI Permatex 56521 High Performance Thread Sealant, 50 ml **Price:** € 27.93 **Availability:** ✅ In Stock ## Summary > 🔩 Seal it like a pro — no leaks, no limits! ## Quick Answers - **What is this?** Permatex 56521 High Performance Thread Sealant, 50 ml - **How much does it cost?** € 27.93 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml) ## 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 - • **Corrosion & Galling Shield:** Protects metal fittings from rust and wear, extending component life. - • **Unmatched Pressure Defense:** Locks threads tight up to 1,000 PSI for leak-proof confidence. - • **Clean, Efficient Application:** Replaces messy tape and dope with a sleek, professional finish every time. - • **Rapid Cure, Lasting Strength:** Fast-setting formula endures pressures up to 10,000 PSI without fail. - • **Extreme Temperature Resilience:** Performs flawlessly from freezing -60°F to scorching 300°F environments. ## Overview Permatex 56521 High Performance Thread Sealant is a heavy-duty, white sealant designed for metal and tapered pipe threads. It provides airtight, watertight seals that resist loosening, corrosion, and galling under pressures up to 1,000 PSI, with a rapid cure strength up to 10,000 PSI. Temperature resistant from -60°F to 300°F, it’s ideal for automotive and industrial applications, offering a cleaner, faster alternative to traditional pipe tape and dope. ## Description Permatex High Performance Thread Sealant offers the ultimate sealing power with the added strength of a blue thread locker. This versatile sealant creates an airtight, watertight hold that prevents leaks, loosening, and corrosion, even under high pressures and temperatures. It seals connections up to 1,000 PSI, with a rapid cure capable of withstanding 10,000 PSI, ensuring leak-proof reliability for your toughest jobs. Temperature resistant from -60°F to 300°F, it’s designed specifically for metal and tapered pipe thread fittings, delivering protection against galling, rust, and corrosion over time. Ideal for stainless steel fittings, oil PSI sending units, oil and coolant lines, intake manifold switches, rear axle fill plugs, fuel fittings, and more, this high-performance thread sealant replaces traditional pipe tape and dope with a faster, cleaner application. Keep your metal connections locked and secure without the risk of leaks, making this sealant a must-have for both professional mechanics and DIY enthusiasts who need lasting, high-strength results. ## Features - High Performance Thread Sealant: Formulated specifically for metal, tapered pipe thread fittings; PTFE-containing formula replaces tape and pipe dopes and seals instantly against low pressure for a reliable seal - Cures Rapidly to 10,000 PSI: Cures quickly to withstand up to 10,000 PSI and prevents leakage from vibration, temperature cycling and extreme pressures; resists hydraulic fluids and fuels once fully cured - Lubricates, Protects & Repositions: Prevents galling and protects mated threaded areas from rust and corrosion; allows parts to be repositioned after application, so fittings can be aligned just right - For Fittings, Sensors & Fluid Lines: Ideal for stainless steel fittings, head bolts into through holes, oil PSI sending units and sensors, oil and coolant lines, intake manifold switches, axle fill plugs and fuel fittings - Trusted by Professionals Since 1909: Permatex has developed chemical solutions for automotive maintenance and repair for more than a century; our thread compounds are formulated to help pros and DIYers get the job done right ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #21,911 in Automotive ( See Top 100 in Automotive ) #47 in Thread Lock Sealers | | Customer Reviews | 4.7 out of 5 stars 651 Reviews | ## Product Details - **Brand:** Permatex - **Item Weight:** 0.11 Pounds - **Item dimensions L x W x H:** 8 x 3 x 2 inches - **Material:** Synthetic Rubber - **Style:** High Performance Thread Sealant ## Images ![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 1](https://m.media-amazon.com/images/I/71XJlR1DA2L.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 2](https://m.media-amazon.com/images/I/81msyXp8sDL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 3](https://m.media-amazon.com/images/I/61pOl+VcCUL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 4](https://m.media-amazon.com/images/I/71UQ7PUtbVL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 5](https://m.media-amazon.com/images/I/81UPnpKtW6L.jpg) ## Questions & Answers **Q: Does this stuff seal pneumatic (800 psi) threads on an and npt fittings.** A: I’ve not used it for your application however, her is the product discription for reference Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings. Features & details Cures rapidly to withstand 10,000 PSI Perfect as a replacement for Vibra-Seal pre-coated parts Prevents galling and protects mated threaded areas from rust and corrosion **Q: Can this be used on plastic pipe** A: Here is a copy and paste of the product description. "Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings". Hope this helps. **Q: What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.** A: I tried a number of things to seal a brass tee into a motorcycle oil pressure outlet. Nothing worked 'til I tried this stuff. Be sure to clean the threads well beforehand. If the stuff is rated for fuel, I'm sure it'll work for your application. It's good stuff. **Q: What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.** A: The special edition is no doubt like many other products listed on Amazon a seller attempting to use the false label of a "special edition" to lure buyers to buy from them at a higher price, without prime shipping and more often than not slower shipping. I am willing to bet if you contact the maker of the product that they do not produce a "special edition". ## Frequently Bought Together - Permatex 56521 High Performance Thread Sealant ,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/ Hand Tools 50 ml - Permatex 85080 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 9.5 oz - Permatex 22058 Dielectric Tune-Up Grease, 3oz. - High Performance Dielectric Grease Used To Protect Terminals, Spark Plugs, Wiring And Other Electrical Connections Against Salt, Dirt, And Corrosion --- ## 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.ie/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml](https://www.desertcart.ie/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-11-15*