--- product_id: 258211059 title: "56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml" brand: "permatex" price: "€ 42.06" currency: EUR in_stock: true category: "Permatex" url: https://www.desertcart.pt/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue store_origin: PT region: Portugal --- # 1000 PSI leak-proof seal Locks threads tight Withstands -60°F to 300°F 56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml **Brand:** permatex **Price:** € 42.06 **Availability:** ✅ In Stock ## Summary > 🔧 Lock it down, seal it tight — the pro’s secret weapon! ## Quick Answers - **What is this?** 56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml by permatex - **How much does it cost?** € 42.06 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue) ## 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 - • **Unmatched Seal & Hold:** Combines thread sealant and blue thread locker for ultimate leak and loosening protection. - • **Pressure-Proof Performance:** Secures fittings with an airtight, watertight seal up to 1000 PSI—no leaks, no worries. - • **Clean, Tape-Free Application:** Replaces messy pipe tape and dope with a smooth, professional-grade sealant for metal threads. - • **Extreme Temperature Resilience:** Operates flawlessly from freezing -60°F to scorching 300°F without breaking down. - • **Rapid Cure, Heavy-Duty Strength:** Fast curing formula handles up to 10,000 PSI, perfect for demanding industrial and DIY tasks. ## Overview Permatex 56521 High Performance Thread Sealant is a dual-action formula combining thread sealing and locking to prevent leaks, loosening, and corrosion. It delivers a watertight seal up to 1000 PSI and rapidly cures to withstand pressures up to 10,000 PSI. Temperature resistant from -60°F to 300°F, it’s ideal for metal and tapered pipe threads in automotive and industrial applications, replacing traditional tapes and dopes with a cleaner, faster solution. ## Description Permatex 56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml : desertcart.ae ## Features - Unbeatable Seal & Hold: Combines the sealing power of thread sealant with the firm hold of a blue thread locker, ensuring connections stay tight and leak-free even under pressure. - High-Pressure, No-Leak Assurance: Delivers an airtight, watertight seal up to 1000 PSI, locking fittings securely against leaks in the toughest conditions. - Temperature Resistant & Durable: Withstands extreme temperatures from -60°F to 300°F, protecting threads from rust, corrosion, and wear. - Fast-Curing Strength: Rapidly cures to handle up to 10,000 PSI, making it perfect for heavy-duty applications like stainless steel fittings, oil lines, and fuel systems. - No More Tape or Pipe Dope Needed: Replaces messy alternatives with a smooth, reliable sealant that’s designed for metal, tapered pipe thread fittings—ideal for professional and DIY projects alike. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000FW7VHI | | Best Sellers Rank | #84,453 in Automotive (See Top 100 in Automotive) #296 in Automotive Fillers, Adhesives & Sealants | | Department | Thread Sealants | | Item Model Number | 56521 | | Manufacturer | Permatex | | Product Dimensions | 20.32 x 7.62 x 5.08 cm; 49.9 g | ## Product Details - **Material:** Rubber - **Brand:** Permatex - **Style:** Thread Sealant - **Item weight:** 0.11 Pounds - **Item dimensions L x W x H:** 20.3 x 7.6 x 5.1 centimeters ## Images ![56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml - Image 1](https://m.media-amazon.com/images/I/71XJlR1DA2L.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". ## 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.pt/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue](https://www.desertcart.pt/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-15*