{"product_id":"mastercool-aluminum-repair-epoxy-paste-90935-alum-bond-machinable-heat-resistant","title":"Mastercool Aluminum Repair Epoxy Paste 90935 — Alum Bond, Machinable \u0026 Heat-Resistant","description":"\u003cstrong\u003eMastercool 90935 Alum Bond is a machinable, aluminum-filled epoxy paste formulated to permanently repair cracks, blow holes and porosity in aluminum castings, radiators, tanks and engine components.\u003c\/strong\u003e\n\n\u003cp\u003eWhether you're a mechanic, HVAC technician, fabricator or DIYer, Alum Bond delivers a heavy-duty metal repair solution when replacing a part isn't practical. This industrial-strength polymer compound combines metallic aluminum filler with a durable resin system to produce repairs that cure hard, resist heat, and can be drilled, sanded or tapped like metal. Its non-sag, paste-like consistency makes it easy to place into cavities, vertical surfaces and irregular cast areas while giving you time to shape and finish before it sets.\u003c\/p\u003e\n\n\u003ch3\u003eHow strong and durable is this repair compound?\u003c\/h3\u003e\n\u003cp\u003eAlum Bond is engineered for demanding service environments, offering high compressive and tensile strength that restores structural integrity to damaged aluminum parts. Cured repairs withstand mechanical loads and routine service stresses found in automotive and industrial equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApproximately 8,600 PSI compressive strength for load-bearing repairs\u003c\/li\u003e\n  \u003cli\u003eAround 3,500 PSI tensile strength to resist pull-apart forces\u003c\/li\u003e\n  \u003cli\u003eHeat-resistant to approximately 250°F (121°C) after full cure\u003c\/li\u003e\n  \u003cli\u003eFormulated to resist oil, coolant and common workshop fluids when cured\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I machine or finish the repair after it cures?\u003c\/h3\u003e\n\u003cp\u003eYes—once fully cured Alum Bond behaves much like a soft metal composite and accepts standard metalworking operations. That makes it possible to re-establish threads, true mating surfaces, or drill holes without replacing the entire component.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrill, sand, file and tap cured material with conventional tools\u003c\/li\u003e\n  \u003cli\u003eUse common machining speeds and cutters for light finishing work\u003c\/li\u003e\n  \u003cli\u003eFinish surfaces to match surrounding geometry for gaskets or fittings\u003c\/li\u003e\n  \u003cli\u003eAllows repair of threads and bores on blocked or cracked parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is it applied and how much working time do I have?\u003c\/h3\u003e\n\u003cp\u003eAlum Bond comes as a two-part paste that is mixed before application; its thick, non-sag texture is designed for controlled placement on vertical or overhead surfaces. Cure speed varies with temperature, so you get a predictable working window to shape and tool the compound before it hardens.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMix the resin and hardener thoroughly to a uniform color for best strength\u003c\/li\u003e\n  \u003cli\u003eNon-sag paste stays in cavities and vertical repairs for accurate filling\u003c\/li\u003e\n  \u003cli\u003eWorking time depends on ambient temperature—follow label guidance for optimal shaping\u003c\/li\u003e\n  \u003cli\u003eAllow full cure time before machining or exposing to high heat\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat types of parts and defects is Alum Bond best for?\u003c\/h3\u003e\n\u003cp\u003eThis product is targeted at aluminum castings and assemblies where porosity, blow holes, cracks or minor structural damage occur. It is commonly used when replacement parts are costly, obsolete or require downtime to source.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRadiators, evaporator housings, heater cores and HVAC cast components\u003c\/li\u003e\n  \u003cli\u003eEngine blocks, valve covers, oil pans and accessory housings\u003c\/li\u003e\n  \u003cli\u003eTanks, pumps, valve bodies and castings with surface defects or porosity\u003c\/li\u003e\n  \u003cli\u003eRestoration of threads, flange faces and mating surfaces after repair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Technicians and advanced hobbyists who need a long-lasting, machinable metal repair without replacing expensive aluminum parts will find Mastercool 90935 Alum Bond especially useful. It suits professional shops performing field or bench repairs, HVAC and refrigeration service techs repairing housings and tanks, and vehicle restorers working with cast components. For best results, follow mixing, application and cure instructions and use proper safety precautions in a well-ventilated workspace.\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 Alum Bond safe to machine after curing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Once fully cured, Alum Bond can be drilled, sanded, tapped and machined with standard tools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What temperature can the repaired area withstand?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Cured repairs resist temperatures up to about 250°F (121°C), suitable for many automotive and HVAC applications.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":48087506550942,"sku":"B00CDDA1OW","price":34.92,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mastercool-alum-bond-front-packaging.jpg?v=1785924992","url":"https:\/\/northtrailauto.ca\/products\/mastercool-aluminum-repair-epoxy-paste-90935-alum-bond-machinable-heat-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}