{"product_id":"loctite-243-blue-medium-strength-threadlocker-50-ml-1-69-fl-oz-oil-tolerant-removable-hold-for-bolts-up-to-3-4","title":"Loctite 243 Blue Medium Strength Threadlocker 50 mL (1.69 fl oz) — Oil-Tolerant, Removable Hold for Bolts up to 3\/4\"","description":"\u003cp\u003e\u003cstrong\u003eLoctite 243 is a medium-strength blue threadlocker designed to lock and seal threaded fasteners while tolerating light oil contamination.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEngineered for general-purpose assembly, this 50 mL (1.69 fl oz) bottle of Loctite 243 offers a balance of secure holding and future serviceability. Its formulation cures anaerobically to form a durable bond that resists vibration and loosening, yet allows disassembly with standard hand tools. Improved oil tolerance means the product can often cure on as-received fasteners without time-consuming degreasing in non-critical applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Loctite 243 prevent loose fasteners in vibrating assemblies?\u003c\/h3\u003e\n\u003cp\u003eLoctite 243 fills the gaps between mating threads, creating a polymer barrier that resists vibration-induced rotation and fretting. Once cured in the absence of air, the adhesive maintains clamp force and reduces the risk of nuts and bolts backing out under cyclic loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMedium strength suitable for maintenance and repair tasks\u003c\/li\u003e\n  \u003cli\u003eAdheres to metal threads to stop micro-motion\u003c\/li\u003e\n  \u003cli\u003eWorks on bolts up to 3\/4\" thread diameter\u003c\/li\u003e\n  \u003cli\u003eReduces need for mechanical locking devices in many applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I apply it to oily or unclean fasteners?\u003c\/h3\u003e\n\u003cp\u003eLoctite 243 has improved oil tolerance, so it can often cure on lightly contaminated or as-received parts without an aggressive cleaning step. For best performance in critical assemblies, remove heavy grease, oils, or coatings to ensure maximum bond strength and predictability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFormulated to cure with some surface oil present\u003c\/li\u003e\n  \u003cli\u003eRecommended to clean heavily contaminated parts when possible\u003c\/li\u003e\n  \u003cli\u003eSpeeds up maintenance where cleaning time is limited\u003c\/li\u003e\n  \u003cli\u003eNot intended as a substitute for proper surface preparation in safety-critical joints\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow strong is the bond and how do I remove fasteners later?\u003c\/h3\u003e\n\u003cp\u003eThis medium-strength threadlocker secures fasteners while still allowing disassembly with typical tools and hand torque. Heat and hand tools are generally sufficient to break the cured adhesive when service or replacement is required, making it practical for maintenance routines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for removable assemblies—holds under load but allows later disassembly\u003c\/li\u003e\n  \u003cli\u003eCan be loosened with standard wrenches; heat may aid stubborn parts\u003c\/li\u003e\n  \u003cli\u003eSuitable where periodic maintenance access is expected\u003c\/li\u003e\n  \u003cli\u003eNot as permanent as high-strength formulations intended for one-time assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for? Loctite 243 is aimed at technicians, repair shops, and DIY enthusiasts who need a reliable, reusable threadlocker for general mechanical work. It fits applications ranging from automotive and industrial maintenance to consumer repairs where a medium-strength, oil-tolerant solution is preferred. The 50 mL size is convenient for bench use and periodic maintenance, offering a practical balance of performance, reusability, and handling for routine fastening tasks.\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: Is Loctite 243 suitable for 3\/4\" bolts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Loctite 243 is formulated for fasteners up to 3\/4\" thread diameter and provides medium-strength locking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to clean parts before using it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Not always. It tolerates light oil, but for best and most consistent results, remove heavy grease or contaminants.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Loctite","offers":[{"title":"Default Title","offer_id":55162517356887,"sku":"B009I2UC3Q","price":29.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/loctite-243-front-label.jpg?v=1790336956","url":"https:\/\/britishgarage.co.uk\/products\/loctite-243-blue-medium-strength-threadlocker-50-ml-1-69-fl-oz-oil-tolerant-removable-hold-for-bolts-up-to-3-4","provider":"British Garage","version":"1.0","type":"link"}