{"id":502,"date":"2025-02-12T11:57:39","date_gmt":"2025-02-12T03:57:39","guid":{"rendered":"https:\/\/hengoseal.com\/?p=502"},"modified":"2025-04-17T10:16:53","modified_gmt":"2025-04-17T02:16:53","slug":"fkm-o-rings-high-temperature-sealing","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/th\/fkm-o-rings-high-temperature-sealing\/","title":{"rendered":"FKM O-Rings for Heat &#038; Chemical Resistance | 2025 Guide"},"content":{"rendered":"<p>FKM O-rings have become a top choice for professionals seeking reliable sealing solutions in extreme environments. But what makes them superior to other options like NBR or silicone? Let's dive into their unique properties and help you determine if they\u2019re the right fit for your application.<\/p>\n<ul>\n<li><strong>FKM O-rings resist heat, oil, and chemicals better than most elastomers\u2014ideal for harsh industrial settings.<\/strong><\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/02\/FKM-O-Rings-1.jpg\" alt=\"placeholder_image\" \/><\/p>\n<p>Whether you're upgrading equipment or choosing seals for a new project, understanding the benefits of FKM O-rings can help you make an informed decision.<\/p>\n<h2>What makes FKM O-rings ideal for extreme temperatures?<\/h2>\n<p>FKM O-rings are known for their thermal stability and resistance to aggressive fluids, which is why they\u2019re heavily used in aerospace, automotive, and chemical industries.<\/p>\n<ul>\n<li><strong>They perform within -20\u00b0C to 250\u00b0C, and some special grades withstand even wider extremes without losing elasticity.<\/strong><\/li>\n<\/ul>\n<p>This makes them a trusted solution in applications where failure is not an option.<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/hengoseal.com\/wp-content\/uploads\/2025\/02\/FKM-Seal-2.jpg\" alt=\"placeholder_image\" \/><\/p>\n<h2>How do FKM O-rings compare with NBR O-rings?<\/h2>\n<p>Choosing between NBR and FKM is about more than just cost\u2014it\u2019s about performance under pressure.<\/p>\n<ul>\n<li><strong>NBR O-rings offer affordability for moderate environments, while FKM delivers long-term durability in aggressive conditions.<\/strong><\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u0e04\u0e38\u0e13\u0e2a\u0e21\u0e1a\u0e31\u0e15\u0e34<\/th>\n<th>\u0e41\u0e2b\u0e27\u0e19\u0e42\u0e2d\u0e23\u0e34\u0e07 NBR<\/th>\n<th>\u0e42\u0e2d\u0e23\u0e34\u0e07 FKM<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0e0a\u0e48\u0e27\u0e07\u0e2d\u0e38\u0e13\u0e2b\u0e20\u0e39\u0e21\u0e34<\/td>\n<td>-40\u00b0C \u0e16\u0e36\u0e07 120\u00b0C<\/td>\n<td>-20\u00b0C \u0e16\u0e36\u0e07 250\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>\u0e17\u0e19\u0e17\u0e32\u0e19\u0e15\u0e48\u0e2d\u0e2a\u0e32\u0e23\u0e40\u0e04\u0e21\u0e35<\/td>\n<td>\u0e08\u0e33\u0e01\u0e31\u0e14<\/td>\n<td>Excellent (fuels, acids, oils)<\/td>\n<\/tr>\n<tr>\n<td>\u0e04\u0e27\u0e32\u0e21\u0e15\u0e49\u0e32\u0e19\u0e17\u0e32\u0e19\u0e15\u0e48\u0e2d\u0e19\u0e49\u0e33\u0e21\u0e31\u0e19<\/td>\n<td>\u0e14\u0e35<\/td>\n<td>\u0e42\u0e14\u0e14\u0e40\u0e14\u0e48\u0e19<\/td>\n<\/tr>\n<tr>\n<td>\u0e01\u0e32\u0e23\u0e43\u0e0a\u0e49\u0e07\u0e32\u0e19\u0e17\u0e31\u0e48\u0e27\u0e44\u0e1b<\/td>\n<td>General hydraulics<\/td>\n<td>High-performance automotive\/industrial<\/td>\n<\/tr>\n<tr>\n<td>\u0e04\u0e48\u0e32\u0e43\u0e0a\u0e49\u0e08\u0e48\u0e32\u0e22<\/td>\n<td>\u0e15\u0e48\u0e33\u0e01\u0e27\u0e48\u0e32<\/td>\n<td>Higher, but longer-lasting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>If you're working with oil systems in less demanding conditions, our <a href=\"https:\/\/hengoseal.com\/th\/product\/nitrile-o-ring\/\" target=\"_blank\">\u0e42\u0e2d\u0e23\u0e34\u0e07\u0e44\u0e19\u0e44\u0e15\u0e23\u0e25\u0e4c<\/a> could be a more cost-effective alternative.<\/p>\n<h2>Are FKM and Viton O-rings the same?<\/h2>\n<p>This is one of the most asked questions. Technically, <strong>Viton is a brand of FKM<\/strong> developed by DuPont, but all Viton O-rings are types of FKM.<\/p>\n<ul>\n<li><strong>Both terms are often used interchangeably, but Viton denotes a specific grade with strict quality control.<\/strong><\/li>\n<\/ul>\n<p>To learn more about general O-ring types and properties, visit our <a href=\"https:\/\/hengoseal.com\/th\/what-are-o-rings-how-they-work\/\" target=\"_blank\">O-Ring Basics Guide<\/a>.<\/p>\n<h2>What chemicals can FKM O-rings resist?<\/h2>\n<p>When operating in chemically aggressive environments, compatibility is crucial. FKM O-rings provide outstanding resistance to many industrial fluids.<\/p>\n<ul>\n<li><strong>They resist most hydrocarbons, fuels, mineral oils, and acids, but are not suitable for ketones or esters.<\/strong><\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u0e40\u0e04\u0e21\u0e35<\/th>\n<th>\u0e04\u0e27\u0e32\u0e21\u0e40\u0e02\u0e49\u0e32\u0e01\u0e31\u0e19\u0e44\u0e14\u0e49<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hydraulic Oils<\/td>\n<td>\u0e22\u0e2d\u0e14\u0e40\u0e22\u0e35\u0e48\u0e22\u0e21<\/td>\n<\/tr>\n<tr>\n<td>Diesel<\/td>\n<td>\u0e22\u0e2d\u0e14\u0e40\u0e22\u0e35\u0e48\u0e22\u0e21<\/td>\n<\/tr>\n<tr>\n<td>Acids (mild)<\/td>\n<td>\u0e14\u0e35<\/td>\n<\/tr>\n<tr>\n<td>\u0e04\u0e35\u0e42\u0e15\u0e19<\/td>\n<td>\u0e22\u0e32\u0e01\u0e08\u0e19<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Explore our in-depth comparison in the <a href=\"https:\/\/hengoseal.com\/th\/fkm-o-ring-vs-nbr-o-ring\/\" target=\"_blank\">\u0e04\u0e39\u0e48\u0e21\u0e37\u0e2d\u0e40\u0e1b\u0e23\u0e35\u0e22\u0e1a\u0e40\u0e17\u0e35\u0e22\u0e1a O-Ring \u0e23\u0e30\u0e2b\u0e27\u0e48\u0e32\u0e07 FKM \u0e41\u0e25\u0e30 NBR<\/a>.<\/p>\n<h2>How do I choose the right FKM O-ring size?<\/h2>\n<p>Choosing the wrong size can lead to leakage and system failure. That\u2019s why we offer both standard and custom sizes.<\/p>\n<ul>\n<li><strong>Refer to our sizing chart and use an assortment kit to test fit multiple seals.<\/strong><\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u0e40\u0e2a\u0e49\u0e19\u0e1c\u0e48\u0e32\u0e19\u0e28\u0e39\u0e19\u0e22\u0e4c\u0e01\u0e25\u0e32\u0e07\u0e40\u0e2a\u0e49\u0e19 (\u0e21\u0e21.)<\/th>\n<th>\u0e0a\u0e48\u0e27\u0e07\u0e40\u0e2a\u0e49\u0e19\u0e1c\u0e48\u0e32\u0e19\u0e28\u0e39\u0e19\u0e22\u0e4c\u0e01\u0e25\u0e32\u0e07\u0e20\u0e32\u0e22\u0e19\u0e2d\u0e01 (\u0e21\u0e21.)<\/th>\n<th>Custom Support<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1.5<\/td>\n<td>4\u2013110<\/td>\n<td>\u2705<\/td>\n<\/tr>\n<tr>\n<td>2.0<\/td>\n<td>5\u2013250<\/td>\n<td>\u2705<\/td>\n<\/tr>\n<tr>\n<td>2.5<\/td>\n<td>10\u2013495<\/td>\n<td>\u2705<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Check our full <a href=\"https:\/\/hengoseal.com\/th\/product\/fkm-o-ring\/\" target=\"_blank\">\u0e2b\u0e19\u0e49\u0e32\u0e1c\u0e25\u0e34\u0e15\u0e20\u0e31\u0e13\u0e11\u0e4c\u0e42\u0e2d\u0e23\u0e34\u0e07 FKM<\/a> for available sizes or get an <a href=\"https:\/\/hengoseal.com\/th\/product\/o-ring-assortment\/\" target=\"_blank\">\u0e0a\u0e38\u0e14\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e42\u0e2d\u0e23\u0e34\u0e07<\/a> for quick replacement on site.<\/p>\n<h2>Which industries use FKM O-rings most?<\/h2>\n<p>FKM O-rings are essential in sectors where both chemical and thermal resistance are critical.<\/p>\n<ul>\n<li><strong>Industries like aerospace, automotive manufacturing, oil &amp; gas, and pharmaceuticals rely heavily on these seals.<\/strong><\/li>\n<\/ul>\n<p>For example, automotive manufacturers use FKM O-rings in fuel injection systems, while chemical plants rely on them to seal aggressive fluids under high heat.<\/p>\n<h2>Your Next Step to Reliable High-Temperature Sealing<\/h2>\n<p>Still unsure if FKM O-rings are right for your needs? We're here to help you choose the perfect material and size for your system.<\/p>\n<p>\ud83d\udce9 <strong>\u0e2d\u0e35\u0e40\u0e21\u0e25:<\/strong> <a href=\"mailto:info@hengoseal.com\">info@hengoseal.com<\/a><br \/>\n\ud83d\udcde <strong>\u0e27\u0e2d\u0e17\u0e2a\u0e4c\u0e41\u0e2d\u0e1b:<\/strong> <a href=\"https:\/\/api.whatsapp.com\/send?phone=8617622979498\" rel=\"nofollow noopener\" target=\"_blank\">+86 17622979498<\/a><br \/>\n\ud83d\udcbc <strong>Explore:<\/strong> <a href=\"https:\/\/hengoseal.com\/th\/product\/fkm-o-ring\/\" target=\"_blank\">View FKM O-Ring Products<\/a><\/p>\n<style>\n.faq-question {\ncursor: pointer;\nfont-weight: bold;\npadding: 10px;\nbackground-color: #f1f1f1;\nborder: 1px solid #ddd;\nmargin-bottom: 5px;\ncolor: #0073aa;\n}\n.faq-answer {\ndisplay: none;\npadding: 10px;\nborder-left: 3px solid #0073aa;\nbackground-color: #f9f9f9;\nmargin-bottom: 10px;\n}\n<\/style>\n<p><script>\ndocument.addEventListener('DOMContentLoaded', function() {\nconst questions = document.querySelectorAll('.faq-question');\nquestions.forEach(question => {\nquestion.addEventListener('click', function() {\nconst answer = this.nextElementSibling;\nanswer.style.display = answer.style.display === 'block' ? 'none' : 'block';\n});\n});\n});\n<\/script><br \/>\n<!-- JSON-LD FAQ Schema --><br \/>\n<script type=\"application\/ld+json\">\n{\n\"@context\": \"https:\/\/schema.org\",\n\"@type\": \"FAQPage\",\n\"mainEntity\": [\n{\n\"@type\": \"Question\",\n\"name\": \"What are FKM O-rings commonly used for?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"FKM O-rings are used in aerospace, chemical, and automotive applications where extreme heat and aggressive fluids are present.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can FKM O-rings resist fuel and solvents?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Yes, they offer excellent resistance to fuels, oils, acids, and solvents, making them ideal for fuel systems.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Are all FKM O-rings Viton?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"All Viton O-rings are FKM, but not all FKM O-rings are branded as Viton.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can I use FKM seals in hydraulic systems?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Absolutely. FKM is widely used in hydraulic systems exposed to high temperatures or aggressive fluids.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"What&rsquo;s the best way to select an FKM O-ring?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Match the size with your groove, ensure chemical compatibility, and check temperature range requirements.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"How do FKM O-rings perform in cold weather?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Standard FKM functions down to -20&deg;C, though special grades are available for colder climates.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"What&rsquo;s the cost difference between FKM and NBR?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"FKM is more expensive but offers longer service life and higher performance under extreme conditions.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Where can I buy custom-size FKM O-rings?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"You can order custom sizes from Hengoseal&rsquo;s <a href=\\\"https:\/\/hengoseal.com\/product\/fkm-o-ring\/\\\" target=\\\"_blank\\\">FKM O-Ring catalog.\"\n}\n}\n]\n}\n<\/script><\/p>\n<h2>\u0e1c\u0e39\u0e49\u0e04\u0e19\u0e22\u0e31\u0e07\u0e16\u0e32\u0e21<\/h2>\n<div class=\"faq-container\">\n<div class=\"faq-question\">1. What are FKM O-rings commonly used for?<\/div>\n<div class=\"faq-answer\">FKM O-rings are used in aerospace, chemical, and automotive applications where extreme heat and aggressive fluids are present.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">2. Can FKM O-rings resist fuel and solvents?<\/div>\n<div class=\"faq-answer\">Yes, they offer excellent resistance to fuels, oils, acids, and solvents, making them ideal for fuel systems.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">3. Are all FKM O-rings Viton?<\/div>\n<div class=\"faq-answer\">All Viton O-rings are FKM, but not all FKM O-rings are branded as Viton.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">4. Can I use FKM seals in hydraulic systems?<\/div>\n<div class=\"faq-answer\">Absolutely. FKM is widely used in hydraulic systems exposed to high temperatures or aggressive fluids.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">5. What\u2019s the best way to select an FKM O-ring?<\/div>\n<div class=\"faq-answer\">Match the size with your groove, ensure chemical compatibility, and check temperature range requirements.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">6. How do FKM O-rings perform in cold weather?<\/div>\n<div class=\"faq-answer\">Standard FKM functions down to -20\u00b0C, though special grades are available for colder climates.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">7. What\u2019s the cost difference between FKM and NBR?<\/div>\n<div class=\"faq-answer\">FKM is more expensive but offers longer service life and higher performance under extreme conditions.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">8. Where can I buy custom-size FKM O-rings?<\/div>\n<div class=\"faq-answer\">You can order custom sizes from Hengoseal\u2019s <a href=\"https:\/\/hengoseal.com\/th\/product\/fkm-o-ring\/\" target=\"_blank\">FKM O-Ring catalog<\/a>.<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>FKM O-rings have become a top choice for professionals seeking reliable sealing solutions in extreme environments. But what makes them [&hellip;]<\/p>","protected":false},"author":1,"featured_media":503,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[37],"tags":[],"class_list":["post-502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-o-ring-seals"],"_links":{"self":[{"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/posts\/502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/comments?post=502"}],"version-history":[{"count":0,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/posts\/502\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/media\/503"}],"wp:attachment":[{"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/media?parent=502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/categories?post=502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hengoseal.com\/th\/wp-json\/wp\/v2\/tags?post=502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}