{"product_id":"permatex-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3oz-81878","title":"Permatex - Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker","description":"\u003ch1\u003ePermatex \u003cmeta charset=\"utf-8\"\u003eUltra Copper® Maximum Temperature RTV Silicone Gasket Maker\u003c\/h1\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"1\" id=\"p-rc_3a18420a42e7089a-186\"\u003e\u003cspan class=\"citation-693 citation-end-693\"\u003ePermatex Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker (81878) is a single-component, high-temperature room-temperature vulcanizing (RTV) silicone formulated for high-heat powersports exhaust junctions and engine sealing applications.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e Standard black or grey RTV silicones break down,\u003c\/span\u003e\u003cspan\u003e harden,\u003c\/span\u003e\u003cspan\u003e and lose adhesion when exposed to sustained exhaust header temperatures,\u003c\/span\u003e\u003cspan\u003e leading to exhaust gas leaks,\u003c\/span\u003e\u003cspan\u003e unburned two-stroke oil (\"spooge\") seepage,\u003c\/span\u003e\u003cspan\u003e and false air intake near oxygen sensors.\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"2\" id=\"p-rc_3a18420a42e7089a-187\"\u003e\u003cspan class=\"citation-692 citation-end-692\"\u003eEngineered with a metallic-copper oxime silicone formula, Ultra Copper withstands continuous operating temperatures up to 600°F (316°C) and intermittent thermal spikes up to 700°F (371°C).\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-691 citation-end-691\"\u003eIt cures upon exposure to atmospheric moisture into a flexible, non-corrosive rubber seal that offers three times the oil resistance of conventional silicones and eight times the flexibility of cut paper or cork gaskets.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan class=\"\"\u003e The neutral-cure,\u003c\/span\u003e\u003cspan class=\"\"\u003e low-odor paste is 100% sensor-safe—preventing oxygen sensor fouling and aluminum flange corrosion—and fills surface gaps up to 0.\u003c\/span\u003e\u003cspan class=\"\"\u003e25 inches (6 mm) across rigid or stamped metal assemblies.\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"3\"\u003eFeatures:\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,0,0\" id=\"p-rc_3a18420a42e7089a-188\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003e700°F Intermittent Thermal Rating:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-690 citation-end-690\"\u003eHandles continuous temperatures from -65°F to 600°F (-54°C to 316°C) and intermittent peaks up to 700°F (371°C) without cracking, shrinking, or hardening.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,1,0\" id=\"p-rc_3a18420a42e7089a-189\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eEnhanced Oil \u0026amp; Fluid Resistance:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-689 citation-end-689\"\u003eDelivers three times greater resistance to synthetic and conventional motor oils, gear lubes, and glycol coolants compared to standard RTV silicones.\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,2,0\" id=\"p-rc_3a18420a42e7089a-190\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eSensor-Safe, Non-Corrosive Oxime Chemistry:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-688 citation-end-688\"\u003eNeutral-cure formulation will not foul oxygen (O2) sensors, damage catalytic converters, or corrode cast aluminum and magnesium flanges.\u003csup class=\"superscript\" data-turn-source-index=\"6\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,3,0\"\u003e\u003cb data-path-to-node=\"4,3,0\" data-index-in-node=\"0\"\u003eHigh Elasticity \u0026amp; Vibration Absorption:\u003c\/b\u003e\u003cspan\u003e Eight times more flexible than traditional cut gaskets,\u003c\/span\u003e\u003cspan\u003e maintaining a seal across dissimilar metals experiencing heavy vibration and thermal expansion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,4,0\"\u003e\u003cb data-path-to-node=\"4,4,0\" data-index-in-node=\"0\"\u003e0.25-Inch Gap-Filling Capacity:\u003c\/b\u003e\u003cspan\u003e Non-sag metallic copper paste bridges surface imperfections and fills flange clearances up to 1\/4 inch (6 mm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"4,5,0\" id=\"p-rc_3a18420a42e7089a-191\"\u003e\u003cb data-path-to-node=\"4,5,0\" data-index-in-node=\"0\"\u003eDual-Purpose Gasket Maker or Dressing:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-687 citation-end-687\"\u003eFunctions either as a standalone form-in-place gasket or as a high-temperature sealant dressing on pre-cut exhaust and engine gaskets.\u003csup class=\"superscript\" data-turn-source-index=\"7\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"5\"\u003eWhat's in the Box:\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"6,0,0\"\u003e\u003cspan\u003e1x Permatex Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker 3 oz (85 g) Squeeze Tube (Part #81878)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"6,1,0\"\u003e\u003cspan\u003e1x Tapered Cut-to-Size Applicator Nozzle with Screw Cap\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 dir=\"ltr\" data-path-to-node=\"7\"\u003eApplication \u0026amp; Compatibility:\u003c\/h4\u003e\n\u003cul dir=\"ltr\" data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003ePrimary Powersports Uses:\u003c\/b\u003e\u003cspan\u003e 2-stroke exhaust pipe manifold spigots and O-ring grooves,\u003c\/span\u003e\u003cspan\u003e 4-stroke header-to-cylinder head flanges,\u003c\/span\u003e\u003cspan\u003e slip-fit exhaust mid-pipe joints,\u003c\/span\u003e\u003cspan\u003e turbocharger\/supercharger flanges,\u003c\/span\u003e\u003cspan\u003e valve covers,\u003c\/span\u003e\u003cspan\u003e oil pans,\u003c\/span\u003e\u003cspan\u003e timing covers,\u003c\/span\u003e\u003cspan\u003e water pump housings,\u003c\/span\u003e\u003cspan\u003e and thermostat housings.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eSubstrate Compatibility:\u003c\/b\u003e\u003cspan\u003e Cast aluminum,\u003c\/span\u003e\u003cspan\u003e billet aluminum,\u003c\/span\u003e\u003cspan\u003e magnesium,\u003c\/span\u003e\u003cspan\u003e stainless steel,\u003c\/span\u003e\u003cspan\u003e mild steel,\u003c\/span\u003e\u003cspan\u003e cast iron,\u003c\/span\u003e\u003cspan\u003e and titanium flanges.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"8,2,0\" id=\"p-rc_3a18420a42e7089a-192\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eFluids Resisted:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-686 citation-end-686\"\u003eSynthetic and petroleum engine oils, 2-stroke transmission oils, gear lubricants, automatic transmission fluid (ATF), and ethylene glycol\/water coolants.\u003csup class=\"superscript\" data-turn-source-index=\"8\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"8,3,0\" id=\"p-rc_3a18420a42e7089a-193\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eLimitation Warning:\u003c\/b\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-685 citation-end-685\"\u003eNot recommended for use as a cylinder head gasket or on components in continuous direct contact with liquid gasoline (such as carburetor float bowls or fuel tank petcocks).\u003csup class=\"superscript\" data-turn-source-index=\"9\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003e2-Stroke Exhaust Spigot \u0026amp; O-Ring Sealing (Stopping \"Spooge\"):\u003c\/b\u003e\u003cspan\u003e On 2-stroke dirt bikes,\u003c\/span\u003e\u003cspan\u003e the junction where the expansion chamber slides over the cylinder exhaust flange is a primary source of unburned oil leaks and air leaks that lean out jetting.\u003c\/span\u003e\u003cspan\u003e Clean the cylinder spigot and pipe collar thoroughly with brake cleaner or contact cleaner.\u003c\/span\u003e\u003cspan\u003e Install fresh Viton exhaust O-rings into the pipe grooves,\u003c\/span\u003e\u003cspan\u003e then coat the O-rings and the inside of the pipe collar with a thin film of Permatex Ultra Copper before sliding the pipe onto the cylinder.\u003c\/span\u003e\u003cspan\u003e The copper RTV lubricates the O-rings during assembly so they do not pinch or roll,\u003c\/span\u003e\u003cspan\u003e while curing into a 700°F thermal barrier that stops black oil drips down the front of the engine cases.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003col start=\"1\" dir=\"ltr\" data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14,0,0\"\u003e\u003cspan\u003eClean both mating surfaces with a residue-free solvent and let dry completely.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14,1,0\"\u003e\u003cspan\u003eCut the applicator nozzle to lay down a continuous 1\/16\" to 1\/8\" bead along one surface,\u003c\/span\u003e\u003cspan\u003e encircling all bolt holes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14,2,0\"\u003e\u003cspan\u003eAssemble the parts immediately while the silicone is wet and tighten the fasteners \u003c\/span\u003e\u003cb data-path-to-node=\"14,2,0\" data-index-in-node=\"83\"\u003efinger-tight\u003c\/b\u003e\u003cspan\u003e until the silicone just begins to squeeze out evenly around the flange perimeter.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"14,3,0\" id=\"p-rc_3a18420a42e7089a-194\"\u003e\u003cspan class=\"citation-684\"\u003eAllow the silicone to set and skin over for \u003c\/span\u003e\u003cb data-path-to-node=\"14,3,0\" data-index-in-node=\"44\" class=\"\"\u003e\u003cspan class=\"citation-684\"\u003e1 to 2 hours\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-684 citation-end-684\"\u003e, then torque the fasteners an additional 1\/4 to 1\/2 turn to final factory torque specifications.\u003csup class=\"superscript\" data-turn-source-index=\"10\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan class=\"\"\u003e Allow a full \u003c\/span\u003e\u003cb data-path-to-node=\"14,3,0\" data-index-in-node=\"167\"\u003e24 hours\u003c\/b\u003e\u003cspan\u003e before exposing the joint to high-pressure oil or sustained high-heat exhaust loads.\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eThe Two-Step RTV Torque Procedure (Do Not Over-Compress Wet Silicone):\u003c\/b\u003e\u003cspan\u003e Unlike instant 1-minute gasket makers,\u003c\/span\u003e\u003cspan\u003e traditional moisture-curing RTV silicones require a two-stage tightening sequence so you do not squeeze all the sealant out of the joint while it is wet:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eExhaust Slip-Joint Assembly:\u003c\/b\u003e\u003cspan\u003e When installing aftermarket 4-stroke slip-on mufflers or full exhaust systems that lack graphite crush gaskets at the mid-pipe junction,\u003c\/span\u003e\u003cspan\u003e apply a light,\u003c\/span\u003e\u003cspan\u003e even coat of Ultra Copper to the inside female sleeve before sliding the pipes together.\u003c\/span\u003e\u003cspan\u003e Wipe away any excess squeeze-out with a dry shop towel immediately before it skins over.\u003c\/span\u003e\u003cspan\u003e This prevents deceleration popping caused by air being drawn into the mid-pipe joint and keeps pipes from seizing together due to galvanic corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\" data-path-to-node=\"16\" id=\"p-rc_3a18420a42e7089a-195\"\u003e\u003cspan class=\"citation-683\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"16\" data-index-in-node=\"0\" class=\"\"\u003e\u003cspan class=\"citation-683\"\u003ePreventing Tube Curing Between Uses:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-683 citation-end-683\"\u003e Moisture in the air triggers the vulcanization process in oxime silicones.\u003csup class=\"superscript\" data-turn-source-index=\"11\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan class=\"\"\u003e When finished dispensing,\u003c\/span\u003e\u003cspan class=\"\"\u003e squeeze a small 1\/4-inch tail of copper paste out past the tip of the plastic nozzle and thread the cap back on.\u003c\/span\u003e\u003cspan class=\"\"\u003e \u003c\/span\u003e\u003cspan class=\"citation-682 citation-end-682\"\u003eThat exposed tip will cure into a solid rubber plug that seals the remaining paste inside the aluminum tube from ambient humidity.\u003csup class=\"superscript\" data-turn-source-index=\"12\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e Before your next project,\u003c\/span\u003e\u003cspan\u003e pull the cured plug out of the nozzle with needle-nose pliers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-685 citation-end-685\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0622\/5720\/1317\/files\/Made_In_The_USA_24865b83-5069-42c1-b4bc-9e28ee4fe2cb.jpg?v=1719961954\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-685 citation-end-685\"\u003ePart Number: 81878\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Permatex","offers":[{"title":"Default Title","offer_id":51183558066341,"sku":"PERMA-COPPER-MAX-RTV","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/5720\/1317\/files\/Permatex_Ultra_Copper_High_Heat_RTV_81878.jpg?v=1794608092","url":"https:\/\/www.tmbrmoto.com\/products\/permatex-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3oz-81878","provider":"TMBR MOTO","version":"1.0","type":"link"}