{"product_id":"castrol-react-srf-racing-brake-fluid-1-litre-bottle","title":"Castrol React SRF Racing Brake Fluid 1 Litre Bottle","description":"\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:54c65dc6-25fa-4d9f-9cd1-08da2a47d54c-2\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"false\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"490863b0-0b85-43f2-9455-ab6a6f68b3f9\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:54c65dc6-25fa-4d9f-9cd1-08da2a47d54c-3\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"0c814f4b-46f7-4dd7-a7fa-c0602e7cd46d\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cp data-start=\"225\" data-end=\"275\"\u003e\u003cstrong data-start=\"225\" data-end=\"275\"\u003eCastrol React SRF Racing Brake Fluid – 1 Litre\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"277\" data-end=\"629\"\u003eCastrol React SRF Racing is widely regarded as \u003cstrong data-start=\"324\" data-end=\"369\"\u003ethe ultimate high-performance brake fluid\u003c\/strong\u003e for motorsport and extreme braking environments. Designed specifically for competition use, SRF is trusted in racing, rallying, and high-performance track day applications where \u003cstrong data-start=\"548\" data-end=\"615\"\u003econsistent pedal feel, strong initial bite, and fade resistance\u003c\/strong\u003e are critical.\u003c\/p\u003e\n\u003cp data-start=\"631\" data-end=\"945\"\u003eThis exclusive Castrol formulation uses \u003cstrong data-start=\"671\" data-end=\"704\"\u003eadvanced, patented technology\u003c\/strong\u003e to deliver exceptional braking stability under sustained high temperatures. With an \u003cstrong data-start=\"789\" data-end=\"841\"\u003eextremely high dry boiling point exceeding 300°C\u003c\/strong\u003e, Castrol SRF dramatically reduces the risk of vapour lock and brake fade during repeated heavy braking.\u003c\/p\u003e\n\u003cp data-start=\"947\" data-end=\"1210\"\u003eIn addition to thermal stability, Castrol React SRF is known for providing a \u003cstrong data-start=\"1024\" data-end=\"1051\"\u003efirmer brake pedal feel\u003c\/strong\u003e, improving driver confidence and delivering \u003cstrong data-start=\"1096\" data-end=\"1121\"\u003estronger initial bite\u003c\/strong\u003e under braking — particularly noticeable during high-speed or threshold braking on track.\u003c\/p\u003e\n\u003cp data-start=\"1212\" data-end=\"1451\"\u003eCastrol React SRF Racing exceeds all major international brake fluid standards, including \u003cstrong data-start=\"1302\" data-end=\"1354\"\u003eDOT 3, DOT 4, ISO 4925, JIS K2233, and SAE J1703\u003c\/strong\u003e, making it suitable for the vast majority of high-performance road and motorsport brake systems.\u003c\/p\u003e\n\u003cp data-start=\"1453\" data-end=\"1702\"\u003eFor maximum efficiency and performance, Castrol recommends replacing the fluid \u003cstrong data-start=\"1532\" data-end=\"1565\"\u003eno later than every 18 months\u003c\/strong\u003e, particularly in competition or track-driven vehicles. Prolonged use beyond this period may lead to reduced low-temperature performance.\u003c\/p\u003e\n\u003cp data-start=\"1704\" data-end=\"1899\"\u003eAt Rennworks Performance, Castrol SRF is a workshop-proven choice for \u003cstrong data-start=\"1774\" data-end=\"1831\"\u003ePorsche, McLaren, and other high-performance vehicles\u003c\/strong\u003e, where braking confidence and pedal consistency are non-negotiable.\u003c\/p\u003e\n\u003chr data-start=\"1901\" data-end=\"1904\"\u003e\n\u003ch3 data-start=\"1906\" data-end=\"1922\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cul data-start=\"1923\" data-end=\"2340\"\u003e\n\u003cli data-start=\"1923\" data-end=\"1972\"\u003e\n\u003cp data-start=\"1925\" data-end=\"1972\"\u003eExtremely high dry boiling point (\u003cstrong data-start=\"1959\" data-end=\"1969\"\u003e\u0026gt;300°C\u003c\/strong\u003e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1973\" data-end=\"2031\"\u003e\n\u003cp data-start=\"1975\" data-end=\"2031\"\u003eOutstanding resistance to brake fade under extreme use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2032\" data-end=\"2084\"\u003e\n\u003cp data-start=\"2034\" data-end=\"2084\"\u003e\u003cstrong data-start=\"2034\" data-end=\"2082\"\u003eFirmer pedal feel with improved initial bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2085\" data-end=\"2150\"\u003e\n\u003cp data-start=\"2087\" data-end=\"2150\"\u003eConsistent braking performance during prolonged heavy braking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2151\" data-end=\"2220\"\u003e\n\u003cp data-start=\"2153\" data-end=\"2220\"\u003eDesigned specifically for motorsport and competition applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2221\" data-end=\"2263\"\u003e\n\u003cp data-start=\"2223\" data-end=\"2263\"\u003eExceeds DOT 3 and DOT 4 specifications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2264\" data-end=\"2340\"\u003e\n\u003cp data-start=\"2266\" data-end=\"2340\"\u003eSuitable for disc and drum brake systems (excluding mineral oil systems)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2342\" data-end=\"2345\"\u003e\n\u003ch3 data-start=\"2347\" data-end=\"2377\"\u003eApplication \u0026amp; Service Life\u003c\/h3\u003e\n\u003cul data-start=\"2378\" data-end=\"2564\"\u003e\n\u003cli data-start=\"2378\" data-end=\"2464\"\u003e\n\u003cp data-start=\"2380\" data-end=\"2464\"\u003e\u003cstrong data-start=\"2380\" data-end=\"2409\"\u003eRecommended Service Life:\u003c\/strong\u003e Replace within \u003cstrong data-start=\"2425\" data-end=\"2438\"\u003e18 months\u003c\/strong\u003e for maximum performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2465\" data-end=\"2564\"\u003e\n\u003cp data-start=\"2467\" data-end=\"2486\"\u003e\u003cstrong data-start=\"2467\" data-end=\"2484\"\u003eSuitable For:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2489\" data-end=\"2564\"\u003e\n\u003cli data-start=\"2489\" data-end=\"2499\"\u003e\n\u003cp data-start=\"2491\" data-end=\"2499\"\u003eRacing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2502\" data-end=\"2514\"\u003e\n\u003cp data-start=\"2504\" data-end=\"2514\"\u003eRallying\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2517\" data-end=\"2531\"\u003e\n\u003cp data-start=\"2519\" data-end=\"2531\"\u003eTrack days\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2534\" data-end=\"2564\"\u003e\n\u003cp data-start=\"2536\" data-end=\"2564\"\u003eHigh-performance road cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2566\" data-end=\"2569\"\u003e\n\u003ch3 data-start=\"2571\" data-end=\"2589\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul data-start=\"2590\" data-end=\"2767\"\u003e\n\u003cli data-start=\"2590\" data-end=\"2658\"\u003e\n\u003cp data-start=\"2592\" data-end=\"2658\"\u003e\u003cstrong data-start=\"2592\" data-end=\"2613\"\u003eBrake Fluid Type:\u003c\/strong\u003e DOT 4 (exceeds DOT 3 \u0026amp; DOT 4 requirements)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2659\" data-end=\"2692\"\u003e\n\u003cp data-start=\"2661\" data-end=\"2692\"\u003e\u003cstrong data-start=\"2661\" data-end=\"2683\"\u003eDry Boiling Point:\u003c\/strong\u003e \u0026gt;300°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2693\" data-end=\"2767\"\u003e\n\u003cp data-start=\"2695\" data-end=\"2767\"\u003e\u003cstrong data-start=\"2695\" data-end=\"2709\"\u003eStandards:\u003c\/strong\u003e FMVSS 116 DOT 3 \u0026amp; DOT 4, ISO 4925, JIS K2233, SAE J1703\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2769\" data-end=\"2772\"\u003e\n\u003ch3 data-start=\"2774\" data-end=\"2787\"\u003ePackaging\u003c\/h3\u003e\n\u003cul data-start=\"2788\" data-end=\"2819\"\u003e\n\u003cli data-start=\"2788\" data-end=\"2819\"\u003e\n\u003cp data-start=\"2790\" data-end=\"2819\"\u003e\u003cstrong data-start=\"2790\" data-end=\"2809\"\u003eContainer Size:\u003c\/strong\u003e 1 Litre\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e","brand":"Rennworks Performance","offers":[{"title":"Default Title","offer_id":56990870700367,"sku":"15C540","price":94.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0942\/0924\/5519\/files\/castrol-SRF-racing-brake-fluid-800x800.jpg?v=1770557517","url":"https:\/\/rennworks-performance.com\/products\/castrol-react-srf-racing-brake-fluid-1-litre-bottle","provider":"Rennworks Performance","version":"1.0","type":"link"}