{"product_id":"loctite-263-high-strength-threadlocker-50ml-red-permanent-locking-for-heavy-duty-fasteners","title":"Loctite 263 High-Strength Threadlocker 50ml — Red, Permanent Locking for Heavy-Duty Fasteners","description":"\u003cp\u003e\u003cstrong\u003eLoctite 263 is a high-strength, red threadlocking adhesive in a 50ml bottle designed to permanently lock and seal threaded metal and plastic fasteners under demanding conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis dual-cure acrylic dimethacrylate ester threadlocker is formulated for heavy-duty assemblies where vibration, torque and solvent exposure threaten fastener integrity. It works by filling the gaps between mating threads and curing to a tough polymer that resists loosening and leakage. The fluorescent red color helps you see where the product is applied, and the dual-cure chemistry ensures reliable setting even in close-fitting or plated components.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Loctite 263 secure fasteners in heavy-duty equipment?\u003c\/h3\u003e\n\u003cp\u003eLoctite 263 forms a permanent, rigid polymer between threads that resists vibration and high shear loads. Because it is a dual-cure acrylic formulation, it can cure anaerobically in the absence of air and acceleratively on metal surfaces for a reliable bond in service environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCreates a high-strength lock that prevents back-out and loosening under torque.\u003c\/li\u003e\n  \u003cli\u003eFills gaps and seals threads to reduce fretting and corrosion.\u003c\/li\u003e\n  \u003cli\u003ePerforms on various metals and some plastics used in industrial assemblies.\u003c\/li\u003e\n  \u003cli\u003eFluorescent red hue allows quick visual confirmation of application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow fast does the adhesive cure and when can parts be used?\u003c\/h3\u003e\n\u003cp\u003eCure speed depends on gap size, substrate and temperature; full fixture strength typically develops within 24 hours at room temperature. Initial handling strength can be achieved sooner on close-fitting steel threads or with elevated temperatures, but allow full cure for maximum shear performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical full cure: approximately 24 hours at 20–25°C on standard steel threads.\u003c\/li\u003e\n  \u003cli\u003eFaster curing on active metal surfaces; slower in larger gaps or inert substrates.\u003c\/li\u003e\n  \u003cli\u003eElevated temperatures accelerate cure; colder conditions slow it down.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat surfaces and applications are suitable for Loctite 263?\u003c\/h3\u003e\n\u003cp\u003eThis threadlocker is intended for metal fasteners and many engineering plastics in applications requiring permanent locking. It is particularly suited to studs, heavy bolts and assemblies in motors, gearboxes and other machinery where high strength and long-term stability are necessary.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIdeal for studs into motor housings, heavy machinery bolts and critical joints.\u003c\/li\u003e\n  \u003cli\u003eWorks on steel, stainless steel, plated parts and some plastics—test plastics first.\u003c\/li\u003e\n  \u003cli\u003eNot recommended where future disassembly is required without heat or mechanical removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I apply Loctite 263 for best results?\u003c\/h3\u003e\n\u003cp\u003ePrepare mating surfaces by removing grease, oil and debris; apply a few drops to the threads and assemble immediately. Wipe off excess and allow the adhesive to cure undisturbed to reach its specified strength.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean threads with solvent or a degreaser before application.\u003c\/li\u003e\n  \u003cli\u003eUse a small amount directly on threads—avoid over-application to reduce mess.\u003c\/li\u003e\n  \u003cli\u003eAssemble parts promptly; clamp or fixture if necessary until cured.\u003c\/li\u003e\n  \u003cli\u003eStore the 50ml bottle upright in a cool, dry place to preserve shelf life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho is this product for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLoctite 263 is aimed at professional mechanics, maintenance technicians and industrial assemblers who need a dependable permanent threadlocker for heavy-duty fasteners. Choose this product when maximum locking strength and long-term resistance to vibration and solvent attack are priorities, and when visual confirmation of application is helpful. It is not ideal for assemblies that require routine disassembly without heat or destructive methods.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can Loctite 263 be removed later?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Loctite 263 is a high-strength, permanent threadlocker; removal usually requires heat and mechanical effort or chemical solvents and can damage parts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is Loctite 263 suitable for stainless steel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—Loctite 263 bonds well to stainless steel and many other metals; test plated or unusual alloys for best results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Loctite","offers":[{"title":"Default Title","offer_id":48084322582686,"sku":"B07PH64QDG","price":29.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/loctite-263-front-label-50ml.jpg?v=1785849836","url":"https:\/\/northtrailauto.ca\/products\/loctite-263-high-strength-threadlocker-50ml-red-permanent-locking-for-heavy-duty-fasteners","provider":"North Trail Auto","version":"1.0","type":"link"}