{"product_id":"loctite-515-gasket-maker-flange-sealant-tube-50-ml-anaerobic-form-in-place-medium-strength-flexible-seal","title":"Loctite 515 Gasket Maker Flange Sealant Tube — 50 ml, anaerobic form-in-place, medium-strength flexible seal","description":"\u003cp\u003e\u003cstrong\u003eLoctite 515 is a medium-strength, anaerobic-forming gasket maker designed to create flexible, form-in-place seals on rigid machined metal flanges with gaps up to 0.25 mm.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for professional automotive and industrial use, Loctite 515 replaces pre-cut gaskets and cures in the absence of air to form a reliable seal that moves with mating surfaces. OEM-approved and lab-tested by Henkel, this methacrylate-based sealant is commonly applied to pumps, thermostat housings, transmission pans, compressor housings and axle covers. It offers a balance of fixture speed and shear strength suitable for many routine flange sealing tasks.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Loctite 515 form a gasket on machined flanges?\u003c\/h3\u003e\n\u003cp\u003eLoctite 515 is applied as a bead or smear to clean, rigid flange faces; when the parts are assembled and air is excluded, the product cures anaerobically to a rubber-like gasket. The cured material bonds to metal and fills small flange irregularities to stop leaks without pre-cut gaskets.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApplies directly from a 50 ml tube for controlled bead placement.\u003c\/li\u003e\n  \u003cli\u003eCures where oxygen is excluded after assembly.\u003c\/li\u003e\n  \u003cli\u003eFills gaps up to 0.25 mm (0.015\" approximately).\u003c\/li\u003e\n  \u003cli\u003eForms a flexible seal that tolerates minor flange movement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat vehicles and parts is this gasket maker suitable for?\u003c\/h3\u003e\n\u003cp\u003eThis product is intended for machined metal components that require a form-in-place gasket rather than a preformed material. It is widely used across gasoline and diesel engines on parts where manufacturers accept anaerobic gasketing solutions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon uses: water pumps, thermostat housings, transmission pans and case covers.\u003c\/li\u003e\n  \u003cli\u003eAlso suited for transaxle casings, compressor housings and axle covers.\u003c\/li\u003e\n  \u003cli\u003eReplaces paper, rubber, cork and other pre-cut gaskets in approved applications.\u003c\/li\u003e\n  \u003cli\u003eOEM-approved where 515 or anaerobic gasketing is specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow strong and fast is the cured seal?\u003c\/h3\u003e\n\u003cp\u003eLoctite 515 provides medium tensile shear strength and a practical working and fixture window for assembly operations. It balances secure bonding with sufficient flexibility so sealed flanges can experience normal service movement without the gasket failing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical tensile shear strength: about 6 N\/mm².\u003c\/li\u003e\n  \u003cli\u003eMedium cure speed with approximately 30 minutes fixture time in typical joint configurations.\u003c\/li\u003e\n  \u003cli\u003eForms a resilient, oil- and fluid-resistant gasket after full cure.\u003c\/li\u003e\n  \u003cli\u003eDesigned for metal-to-metal rigid flanges rather than soft or highly flexible mating faces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I prepare surfaces and apply the product for best results?\u003c\/h3\u003e\n\u003cp\u003eSurface preparation and correct application are key to reliable sealing. Clean, dry, and oil-free flange faces promote good adhesion and consistent cure; then apply a continuous bead or pattern suited to the flange geometry before assembling parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemove old gaskets, oil, grease and loose debris; use appropriate cleaners.\u003c\/li\u003e\n  \u003cli\u003eApply a continuous bead around the flange mating surface; avoid excessive squeezout.\u003c\/li\u003e\n  \u003cli\u003eAssemble parts within working time so the anaerobic cure can occur under compression.\u003c\/li\u003e\n  \u003cli\u003eAllow specified fixture and full cure times before pressurizing or returning to service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for?\u003c\/p\u003e\n\u003cp\u003eThis 50 ml tube of Loctite 515 is aimed at professional mechanics, automotive technicians, race teams and experienced DIYers who need an OEM-approved anaerobic gasket maker for machined metal flanges. It's ideal when a form-in-place, flexible seal is preferred over cutting and fitting traditional gaskets—especially for water pumps, thermostat housings, transmissions and other rigid metal assemblies where manufacturers permit anaerobic gasketing. If you require rapid fixture time combined with a resilient, medium-strength seal that withstands normal engine and driveline service conditions, Loctite 515 is an appropriate choice.\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 515 replace paper or cork gaskets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — when manufacturers allow anaerobic gasketing, Loctite 515 forms a reliable substitute for pre-cut paper, rubber or cork gaskets on rigid machined flanges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What gap can Loctite 515 fill?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Loctite 515 is suitable for gaps up to 0.25 mm (about 0.015 inches) between machined flange faces.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Loctite","offers":[{"title":"Default Title","offer_id":48084319797406,"sku":"B0002KKTTA","price":34.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/loctite-515-front-tube.jpg?v=1785849734","url":"https:\/\/northtrailauto.ca\/products\/loctite-515-gasket-maker-flange-sealant-tube-50-ml-anaerobic-form-in-place-medium-strength-flexible-seal","provider":"North Trail Auto","version":"1.0","type":"link"}