{"product_id":"tsi-supercool-rd8-radiator-u-v-leak-detection-dye-purple-8-oz-water-based-self-measure-bottle","title":"TSI Supercool RD8 Radiator U\/V Leak Detection Dye, Purple 8 oz — Water-Based, Self-Measure Bottle","description":"\u003cp\u003e\u003cstrong\u003eTSI Supercool RD8 is an 8-ounce, water-based purple U\/V radiator dye in a self-measure bottle designed to reveal cooling-system leaks quickly under any U\/V light.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis concentrated synthetic dye mixes with coolant or water to make leaks visible when inspected with a U\/V lamp. The purple formula is water compatible and formulated for rapid fluorescence, giving technicians and DIYers a fast way to locate leaks in water-cooled engines without dismantling the system. The bottle’s built-in measurement markings simplify dosing — one ounce treats a single vehicle — and the dye is formulated to work with common coolant systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use the RD8 dye to find a leak?\u003c\/h3\u003e\n\u003cp\u003eAdd the measured dye to the radiator or coolant reservoir while the engine is cool, run the engine briefly to circulate, then inspect with a U\/V light. Any breach in hoses, gaskets, or components will fluoresce purple green under UV, revealing the leak source for repair planning. Follow vehicle and product safety guidelines when topping off fluids.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse 1 ounce per vehicle as directed on the bottle.\u003c\/li\u003e\n  \u003cli\u003ePour into the radiator or overflow reservoir with engine cold.\u003c\/li\u003e\n  \u003cli\u003eRun engine to circulate, then scan with a U\/V lamp in a dim area.\u003c\/li\u003e\n  \u003cli\u003eLook for bright fluorescence at hose joins, seals, or around the water pump.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill RD8 work with my car’s coolant?\u003c\/h3\u003e\n\u003cp\u003eRD8 is water-based and designed to mix into most conventional coolant and water systems used in water-cooled engines. It is intended for diagnostic use and dyes the circulating fluid so leaks become visible under ultraviolet light. For application in unusual or manufacturer-specific systems, consult the vehicle manual or a technician before use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with standard antifreeze\/coolant and water-cooled systems.\u003c\/li\u003e\n  \u003cli\u003eDesigned for diagnostic tracing, not as a long-term coolant additive.\u003c\/li\u003e\n  \u003cli\u003eSafe for typical cooling components when used as directed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow soon will I see the leak after adding the dye?\u003c\/h3\u003e\n\u003cp\u003eFluorescence is usually visible shortly after circulation; small or slow leaks may take longer or require a pressure check to force dye through the defect. Inspecting with a U\/V lamp in low light improves contrast and helps spot faint traces. If no dye shows, repeat the check after additional run-time or perform a pressure test to confirm.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMost visible after a few minutes of circulation.\u003c\/li\u003e\n  \u003cli\u003eUse a U\/V light and dark environment for best results.\u003c\/li\u003e\n  \u003cli\u003ePressure testing can help reveal slow leaks that don’t show immediately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: TSI Supercool RD8 suits automotive technicians, fleet maintenance teams, and DIY vehicle owners who need a reliable diagnostic dye to pinpoint coolant leaks quickly. It’s especially useful for troubleshooting intermittent or hard-to-find leaks without extensive disassembly. The self-measure bottle and single-ounce dosing make it convenient for occasional use or for keeping in a toolbox for emergency diagnostics.\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: How much RD8 dye do I add per vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use 1 ounce of RD8 per vehicle; the bottle includes measurement markings for easy dosing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a special light to see the dye?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — inspect with any U\/V (ultraviolet) lamp in low light to make the dye fluoresce and reveal leaks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TSI Supercool","offers":[{"title":"Default Title","offer_id":67591932444857,"sku":"B008PKWEHY","price":60.23,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/tsi-supercool-rd8-front-label.jpg?v=1790560273","url":"https:\/\/redleafauto.ca\/products\/tsi-supercool-rd8-radiator-u-v-leak-detection-dye-purple-8-oz-water-based-self-measure-bottle","provider":"Redleaf Auto","version":"1.0","type":"link"}