{"id":690,"date":"2026-10-02T20:05:31","date_gmt":"2026-10-02T12:05:31","guid":{"rendered":"https:\/\/www.katmoto.com\/?p=690"},"modified":"2026-10-02T20:05:31","modified_gmt":"2026-10-02T12:05:31","slug":"ev-coolant-supplier-checklist-importers","status":"publish","type":"post","link":"https:\/\/www.katmoto.com\/zh\/2026\/10\/02\/ev-coolant-supplier-checklist-importers\/","title":{"rendered":"How to Source Low-Conductivity EV Coolant: An Importer\u2019s Testing and RFQ Checklist"},"content":{"rendered":"<article class=\"katmoto-article-shell\">\n<p class=\"katmoto-byline\">Written and technically reviewed by Leo Zhuang \u2014 Automotive Lubricants Product Lead<\/p>\n<h2 id=\"quick-answer\">Quick Answer<\/h2>\n<p>An EV coolant quotation is not complete when it says only \u201clow conductivity\u201d and gives a freeze point. First identify the vehicle and the particular thermal circuit: battery, e-drive, power electronics, fuel-cell stack or an ordinary engine loop. Then ask for the OEM coolant specification, a product-specific conductivity result with its test method and temperature, freeze and corrosion evidence, material-compatibility data, the current TDS and SDS, and a batch-release plan. A glycol-based low-conductivity EV coolant is not automatically a dielectric immersion fluid or a substitute for every vehicle\u2019s factory fill. ASTM\u2019s EV-coolant specification and conductivity test method address different questions, while China\u2019s GB 29743.2-2025 is a distinct market-specific standard. <a href=\"#source-1\">[1]<\/a> <a href=\"#source-2\">[2]<\/a> <a href=\"#source-3\">[3]<\/a><\/p>\n<nav class=\"katmoto-toc\" aria-label=\"Table of contents\"><strong>Table of Contents<\/strong><\/p>\n<ol>\n<li><a href=\"#scope\">Identify the thermal circuit<\/a><\/li>\n<li><a href=\"#standards\">What the standards do\u2014and do not\u2014prove<\/a><\/li>\n<li><a href=\"#conductivity\">Ask how conductivity was measured<\/a><\/li>\n<li><a href=\"#product\">Where KATMOTO EV-LC 100 fits<\/a><\/li>\n<li><a href=\"#workflow\">Seven-step importer RFQ workflow<\/a><\/li>\n<li><a href=\"#documents\">Document and shipment checks<\/a><\/li>\n<li><a href=\"#mistakes\">Common sourcing mistakes<\/a><\/li>\n<li><a href=\"#checklist\">Pre-order checklist<\/a><\/li>\n<li><a href=\"#faq\">Frequently asked questions<\/a><\/li>\n<li><a href=\"#sources\">Sources &amp; References<\/a><\/li>\n<\/ol>\n<\/nav>\n<h2 id=\"scope\">Identify the thermal circuit before naming a coolant<\/h2>\n<p>\u201cEV coolant\u201d is a useful search term, but a poor final application instruction. One vehicle may have several thermal loops and different fluids or service rules for each. A cooling plate beside a battery, an e-motor\/inverter loop, a heat-pump circuit, a fuel-cell stack and a conventional combustion-engine loop are not interchangeable destinations. The buyer should record the vehicle model, year, powertrain, exact circuit, factory-fill or service-fluid identifier, and any service bulletin before comparing suppliers.<\/p>\n<p>The distinction between low-conductivity glycol coolant and waterless dielectric fluid is particularly important. ASTM D8566-24 addresses fully formulated glycol-based low-conductivity EV coolant used as supplied; its scope excludes direct immersion in energized components and does not cover coolant circulating within a fuel-cell stack. An importer should therefore reject a sales chart that treats \u201clow conductivity,\u201d \u201cdielectric,\u201d \u201cbattery coolant\u201d and \u201cfuel-cell coolant\u201d as synonyms. <a href=\"#source-1\">[1]<\/a><\/p>\n<div class=\"katmoto-table-scroll\" style=\"overflow-x:auto\">\n<table style=\"border-collapse:collapse;width:100%;min-width:680px\">\n<caption>Scope questions that prevent a wrong-fluid quotation<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">Application on the RFQ<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">What to verify<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">Unsafe shortcut<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Battery or e-drive liquid loop<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">OEM fluid identity, circuit materials, conductivity requirement and service procedure<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">\u201cAny pink OAT coolant will work\u201d<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Direct-contact immersion system<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Whether a separate waterless dielectric specification applies<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Calling a glycol-water coolant an immersion fluid<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Fuel-cell stack<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Stack-specific OEM instruction and fluid evidence<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Extending a battery-loop claim to the stack<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Combustion-engine loop in a hybrid<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Engine-coolant specification and maintenance requirement<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Assuming an EV label overrides the engine manual<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 id=\"standards\">What the standards do\u2014and do not\u2014prove<\/h2>\n<p>ASTM D3306-21 covers glycol-based engine coolants for automobile and light-duty service. ASTM D8566-24, by contrast, addresses glycol-based EV coolant where low electrical conductivity is required. Neither title makes a particular commercial product compliant by itself. A buyer needs a current, product-specific statement supported by test records, and must still check the vehicle maker\u2019s instructions. <a href=\"#source-1\">[1]<\/a> <a href=\"#source-4\">[4]<\/a><\/p>\n<p>For a China-market brief, the official national-standards portal lists GB 29743.2-2025, <em>Motor vehicle coolant\u2014Part 2: Electric vehicle coolant<\/em>, as current, published 28 March 2025 and effective 1 October 2025. Record the edition and obtain the relevant conformity evidence rather than copying \u201cGB compliant\u201d from a brochure. Outside China, the standard can be useful technical context, but it is not a universal vehicle approval or an automatic legal requirement in every destination. <a href=\"#source-3\">[3]<\/a><\/p>\n<h2 id=\"conductivity\">Ask how conductivity was measured<\/h2>\n<p>A number in \u03bcS\/cm is meaningful only with the sample identity and measurement conditions. ASTM D8634-25 is a test method for conductivity of EV-coolant samples using a conductometer; its published scope covers glycol-based coolants and measurements in the 20\u201330 \u00b0C range. Temperature, instrument calibration, sample handling and contamination affect comparisons. Put the method, reference temperature, result, unit and acceptance limit on the same record. <a href=\"#source-2\">[2]<\/a><\/p>\n<p>More importantly, ask whether the result is a typical development value, a guaranteed specification or an actual production-batch measurement. Those are three different types of evidence. A supplier may legitimately publish a typical target on a product page, but purchasing should not silently turn it into a lot-release limit. Agree the acceptance limit and test method in the purchase specification, then request the batch COA or test report before shipment.<\/p>\n<p>Conductivity alone is not a complete coolant qualification. Corrosion behaviour, freezing and boiling protection, elastomer and polymer compatibility, heat-transfer system design, contamination control and storage stability belong in the technical review. The fluid must match the vehicle and the circuit, not just one attractive laboratory number. <a href=\"#source-1\">[1]<\/a><\/p>\n<h2 id=\"product\">Where KATMOTO EV-LC 100 fits<\/h2>\n<p><a href=\"https:\/\/www.katmoto.com\/en\/product\/ev-lc-100\/\">KATMOTO EV-LC 100<\/a> is presented as a ready-to-use, ethylene-glycol OAT coolant for selected EV\/PHEV thermal-management loops, with \u221235 \u00b0C and \u221250 \u00b0C grades. The product page lists 200 L drums and 1,000 L IBCs, and publishes typical conductivity values around 60\u201368 \u03bcS\/cm at 25 \u00b0C. Those are the supplier\u2019s product-page statements, not an independent certification or proof of compatibility with every EV. The page also states that final production data should be confirmed by an official TDS and laboratory report. <a href=\"#source-5\">[5]<\/a><\/p>\n<p>The product page uses \u201cmeets and exceeds GB 29743.2-2025\u201d wording. If that claim matters to your purchase or artwork, request the exact test report, edition, tested grade and lot or representative sample, and agree how the claim may be reproduced in your market. Do not rewrite it as \u201cOEM approved\u201d or \u201cASTM certified.\u201d KATMOTO\u2019s own important notice says that \u201csuitable for\u201d is not an official approval. <a href=\"#source-5\">[5]<\/a><\/p>\n<figure style=\"max-width:760px;margin:24px auto;text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.katmoto.com\/wp-content\/uploads\/2026\/10\/katmoto-200l-illustrative.jpg\" alt=\"Two KATMOTO-branded 200 L drums illustrating bulk packaging; EV-LC 100 product label not shown\" width=\"760\" height=\"570\" style=\"display:block;max-width:100%;height:auto;margin:auto\" loading=\"lazy\"><figcaption>Illustrative KATMOTO bulk packaging. Confirm the final EV-LC 100 drum\/IBC artwork and batch markings before approving a commercial order.<\/figcaption><\/figure>\n<h2 id=\"workflow\">Seven-step importer RFQ workflow<\/h2>\n<ol>\n<li><strong>Map the vehicles and loops.<\/strong> Supply model years, destination markets, fleet or workshop demand, and the precise circuit. Separate battery\/e-drive, fuel-cell and engine-loop requests.<\/li>\n<li><strong>Record the controlling requirement.<\/strong> Name the OEM fluid specification or part number, any allowed alternatives, the freeze grade, and the service rule. If a standard such as ASTM D8566 or GB 29743.2 is requested, state its edition.<\/li>\n<li><strong>Request the exact technical file.<\/strong> Match TDS, SDS, product code, concentration, grade and current revision. Obtain supporting conductivity, corrosion and compatibility data appropriate to the claim.<\/li>\n<li><strong>Define the conductivity acceptance test.<\/strong> Specify method, temperature, sampling point, limit and whether the figure is a typical value or a batch-release requirement. Agree how a disputed result is retested.<\/li>\n<li><strong>Freeze bulk packaging.<\/strong> Confirm 200 L drum or 1,000 L IBC availability for the quoted grade, closure, tamper evidence, cleanliness, material compatibility, net quantity, label language, pallet and handling requirements. Do not infer MOQ or lead time from pack size.<\/li>\n<li><strong>Approve claims and artwork.<\/strong> Separate a supplier performance statement from a formally approved vehicle application. Check product name, grade, warnings, importer details and batch-code location before printing.<\/li>\n<li><strong>Release a traceable batch.<\/strong> Reconcile PO, final artwork, batch identity, COA or agreed test record, packing list and shipping marks. Establish change notification for formula, water quality, packaging or label revisions.<\/li>\n<\/ol>\n<h2 id=\"documents\">Document and shipment checks<\/h2>\n<div class=\"katmoto-table-scroll\" style=\"overflow-x:auto\">\n<table style=\"border-collapse:collapse;width:100%;min-width:680px\">\n<caption>Evidence to request before approving EV coolant supply<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">Record<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">Buyer\u2019s check<\/th>\n<th style=\"border:1px solid #cbd5e1;padding:10px\">Hold point<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">OEM application<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Exact vehicle, year, circuit, fluid number and service bulletin<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Only \u201cEV suitable\u201d appears<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">TDS and test support<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Grade, concentration, claims, conductivity method\/temperature and corrosion evidence<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Test belongs to another formula or grade<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">SDS and market file<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Current product identity, handling, transport and required language<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Destination obligations unresolved<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">COA or lot report<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Actual lot, tests, units, limits and release decision as agreed<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Typical brochure values copied as lot results<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Pack and shipment file<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Approved drum\/IBC, seals, label revision, quantity, batch and marks<\/td>\n<td style=\"border:1px solid #cbd5e1;padding:10px\">Mismatch with PO or approved artwork<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 id=\"mistakes\">Common sourcing mistakes<\/h2>\n<ul>\n<li>Using coolant colour as evidence of chemistry or vehicle compatibility.<\/li>\n<li>Assuming a low-conductivity glycol coolant is suitable for direct battery immersion.<\/li>\n<li>Adding water to a ready-to-use product without an explicit OEM and supplier instruction.<\/li>\n<li>Copying a development conductivity target into a purchase contract without defining temperature, method and sampling.<\/li>\n<li>Using a China-market standard claim as if it were a global OEM approval.<\/li>\n<li>Approving a generic drum photograph instead of final product-specific bulk artwork.<\/li>\n<li>Ordering one fluid for every hybrid or EV loop because the sales catalogue uses the phrase \u201cEV coolant.\u201d<\/li>\n<\/ul>\n<h2 id=\"checklist\">Pre-order checklist<\/h2>\n<p>Before sending the first purchase order, keep one controlled file containing: the destination market; vehicle and circuit map; OEM fluid identifiers; requested standard and edition; KATMOTO product code and freeze grade; current TDS\/SDS; conductivity method, temperature and acceptance rule; corrosion and material-compatibility support; final pack and label; lot-testing agreement; shipping documents; and a named technical approver. The answer may be \u201cnot yet confirmed\u201d for a proposed application. That is better than a confident but unsupported cross-reference.<\/p>\n<h2 id=\"faq\">Frequently Asked Questions<\/h2>\n<h3>Is every EV coolant low conductivity?<\/h3>\n<p>No. EVs use different thermal architectures and circuit requirements. Read the vehicle service information before selecting a low-conductivity product.<\/p>\n<h3>Can an ordinary engine coolant be used in a battery loop?<\/h3>\n<p>Not on the strength of colour, glycol base or freeze point alone. Confirm the OEM fluid requirement and the exact product\u2019s supported application. ASTM D3306 and ASTM D8566 have different scopes. <a href=\"#source-1\">[1]<\/a> <a href=\"#source-4\">[4]<\/a><\/p>\n<h3>Does \u201clow conductivity\u201d mean a coolant is a dielectric immersion fluid?<\/h3>\n<p>No. Glycol-based low-conductivity coolants and waterless direct-immersion fluids are different design categories. ASTM D8566 excludes direct immersion use. <a href=\"#source-1\">[1]<\/a><\/p>\n<h3>Should an importer compare two conductivity numbers directly?<\/h3>\n<p>Only after checking method, temperature, sample condition, units and whether the figures are typical or batch-specific. ASTM D8634 is a relevant EV-coolant test method. <a href=\"#source-2\">[2]<\/a><\/p>\n<h3>Can EV-LC 100 be diluted at the destination?<\/h3>\n<p>The KATMOTO product page presents EV-LC 100 as ready to use. Do not dilute or mix it unless the vehicle maker and current product instructions expressly permit that procedure. <a href=\"#source-5\">[5]<\/a><\/p>\n<h3>Does a GB 29743.2-2025 claim equal official OEM approval?<\/h3>\n<p>No. A standard-conformity claim, independent test evidence and vehicle-maker approval are separate. Request proof for the exact formulation and grade, and verify any claimed OEM approval separately. <a href=\"#source-3\">[3]<\/a><\/p>\n<h3>What should a bulk-buyer RFQ include?<\/h3>\n<p>Provide the vehicle and circuit map, destination, freeze grade, required standard, conductivity acceptance test, technical documents, drum\/IBC and label plan, expected demand, and batch-release requirements. Ask the supplier to confirm what is supported rather than inventing a universal fitment list.<\/p>\n<h2 id=\"cta\">Turn the application list into a controlled quotation<\/h2>\n<p>Review the <a href=\"https:\/\/www.katmoto.com\/en\/product\/ev-lc-100\/\">KATMOTO EV-LC 100 product page<\/a>, then <a href=\"https:\/\/www.katmoto.com\/en\/contact-us\/\">contact KATMOTO<\/a> with the target vehicles, coolant loops, destination country, freeze grades and documentation checklist. If you are building a regional range, see <a href=\"https:\/\/www.katmoto.com\/en\/become-distributor\/\">Become Distributor<\/a>. Our <a href=\"https:\/\/www.katmoto.com\/en\/2026\/08\/11\/concentrate-vs-premixed-engine-coolant-importer-guide\/\">engine-coolant concentration guide<\/a> explains a related but different purchasing decision.<\/p>\n<h2 id=\"sources\">Sources &amp; References<\/h2>\n<ol>\n<li id=\"source-1\">ASTM International, <a href=\"https:\/\/store.astm.org\/d8566-24.html\">ASTM D8566-24, Standard Specification for Glycol-Based Electric Vehicle Coolant with Low Electrical Conductivity<\/a> (2024), public scope and catalog record.<\/li>\n<li id=\"source-2\">ASTM International, <a href=\"https:\/\/store.astm.org\/d8634-25.html\">ASTM D8634-25, Standard Test Method for Measurement of Conductivity in Electric Vehicle Coolants<\/a> (2025), public scope and catalog record.<\/li>\n<li id=\"source-3\">State Administration for Market Regulation \/ Standardization Administration of China, <a href=\"https:\/\/openstd.samr.gov.cn\/bzgk\/std\/newGbInfo?hcno=909D7D656F148E8F0D6EF0A950DD84A9\">GB 29743.2-2025 official standard record<\/a> (published 28 March 2025; effective 1 October 2025).<\/li>\n<li id=\"source-4\">ASTM International, <a href=\"https:\/\/store.astm.org\/d3306-21.html\">ASTM D3306-21, Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service<\/a> (2021), public scope and catalog record.<\/li>\n<li id=\"source-5\">KATMOTO, <a href=\"https:\/\/www.katmoto.com\/en\/product\/ev-lc-100\/\">EV-LC 100 product information<\/a>, reviewed 2 October 2026. Product-page claims require product-specific TDS and test evidence before contractual use.<\/li>\n<\/ol>\n<aside class=\"katmoto-author-review\">\n<h2>About the author and technical reviewer<\/h2>\n<p><strong>Leo Zhuang \u2014 Automotive Lubricants Product Lead.<\/strong> Leo Zhuang has 16 years of automotive lubricant industry experience across product selection, specifications, applications and B2B purchasing requirements.<\/p>\n<\/aside>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Written and technically reviewed by Leo Zhuang \u2014 Automotive Lubricants Product Lead Quick Answer An EV coolant quotation is not complete when it says only \u201clow conductivity\u201d and gives a freeze point. First identify the vehicle and the particular thermal circuit: battery, e-drive, power electronics, fuel-cell stack or an ordinary engine loop. Then ask for [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":692,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-690","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-insights"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>EV Coolant Supplier Checklist for Importers | KATMOTO<\/title>\n<meta name=\"description\" content=\"Source low-conductivity EV coolant with a defensible RFQ. 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