--- product_id: 30694019 title: "Permatex 56521 High Performance Thread Sealant, 50 ml, White" brand: "permatex" price: "₪85" currency: ILS in_stock: true reviews_count: 12 url: https://www.desertcart.co.il/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml-white store_origin: IL region: Israel --- # 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, White **Brand:** permatex **Price:** ₪85 **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, White by permatex - **How much does it cost?** ₪85 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml-white) ## Best For - permatex enthusiasts ## Why This Product - Trusted permatex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Cure Strength:** Achieves a rock-solid hold that endures pressures up to 10,000 PSI. - • **Clean, Fast, and Reliable:** Replaces messy tape and dope with a quick, professional-grade application. - • **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. - • **Extreme Temperature Resilience:** Performs flawlessly from freezing -60°F to scorching 300°F environments. ## Overview Permatex 56521 High Performance Thread Sealant is a premium 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 rapid cure strength up to 10,000 PSI. Temperature resistant from -60°F to 300°F, it’s ideal for automotive and industrial applications, delivering 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 - These Are Complete Line Of Heavy-Duty Shop Products - These Products On Exceptionally High Order Fulfillment Rates, Breadth Of Available Products - Through Creativity, Productivity And Innovation - This Brand Continues To Develop The Finest Automotive Accessories - Part number: 56521 ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000FW7VHI | | Best Sellers Rank | #712 in Automotive (See Top 100 in Automotive) #3 in Thread Lock Sealers | | Date First Available | April 1, 2004 | | Department | Thread Sealants | | Is Discontinued By Manufacturer | No | | Item Model Number | 56521 | | Item Weight | 1.76 ounces | | Manufacturer | Permatex | | Product Dimensions | 8 x 3 x 2 inches | ## 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, White - Image 1](https://m.media-amazon.com/images/I/71XJlR1DA2L.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml, White - Image 2](https://m.media-amazon.com/images/I/81msyXp8sDL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml, White - Image 3](https://m.media-amazon.com/images/I/61pOl+VcCUL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml, White - Image 4](https://m.media-amazon.com/images/I/71UQ7PUtbVL.jpg) ![Permatex 56521 High Performance Thread Sealant, 50 ml, White - Image 5](https://m.media-amazon.com/images/I/81UPnpKtW6L.jpg) ## Available Options This product comes in different **Size, Style** options. ## 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". ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by on Reviewed in the United States May 22, 2026* Sorted my leaking head bolts in an Ls. Used arp but the chromolly bolts don’t come with sealer like all the stock and stock replacement bolts do. Put on 3/4 of thread and install. Perfect. Further used on head plugs. Sealed up also without leaks. The stuff is incredible for automotive. ### ⭐⭐⭐⭐⭐ Does at it says it does.. *by on Reviewed in the United States April 14, 2026* Used it for my Nissan rear differential. No issues. ### ⭐⭐⭐⭐⭐ Great sealant *by on Reviewed in the United States October 13, 2025* Meets expectations ## 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.co.il/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml-white](https://www.desertcart.co.il/products/30694019-permatex-56521-high-performance-thread-sealant-50-ml-white) --- *Product available on Desertcart Israel* *Store origin: IL* *Last updated: 2026-07-09*