{"id":1167,"date":"2026-10-22T13:44:17","date_gmt":"2026-10-22T13:44:17","guid":{"rendered":"https:\/\/www.marcorubber.com\/blog\/?p=1167"},"modified":"2026-10-22T13:44:17","modified_gmt":"2026-10-22T13:44:17","slug":"chemical-resistant-seals-for-aggressive-solvents-in-chemical-processing","status":"publish","type":"post","link":"https:\/\/www.marcorubber.com\/blog\/?p=1167","title":{"rendered":"Chemical-Resistant Seals for Aggressive Solvents in Chemical Processing"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Chemical-resistant seals rarely face just one chemical. Over its life, a single pump or valve may see solvents, acids, caustics, and cleaning agents. Consequently, a seal that handles one stream can fail quickly in the next. This article explains how to choose seal materials by solvent family, from ketones and aromatics to strong bases and amines. It also covers when FFKM, encapsulated O-rings, or <a href=\"https:\/\/www.marcorubber.com\/spring-energized-seals.htm\" target=\"_blank\" rel=\"noopener\">spring-energized PTFE seals<\/a> are the right fit. For material selection in other industries, see our <a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1135\">Complete Guide to Elastomer Seal Materials<\/a>.<\/span><\/p>\n<h2><strong>Chemical Resistant Seals<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Chemical processing plants run pumps, valves, mechanical seals, pipe couplings, and reactors on aggressive media. Often, a single line carries several chemicals over its life. For that reason, chemical-resistant seals must cover the whole process, including cleaning steps. Marco&#8217;s <a href=\"https:\/\/www.marcorubber.com\/cpi.htm\" target=\"_blank\" rel=\"noopener\">chemical processing (CPI) guide<\/a> details the options.<\/span><\/p>\n<h3><strong>Elastomers Compatible with Aggressive Solvents<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">No single elastomer resists every solvent except FFKM. Therefore, start with the solvent family and narrow from there.<\/span><\/p>\n<ul>\n<li><strong>Ketones (MEK, acetone, MIBK):<\/strong> EPDM works for many ketones. However, it fails in oils. Among fluoroelastomers, Viton\u00ae ETP (Marco <a href=\"https:\/\/www.marcorubber.com\/store\/compound\/V1020\" target=\"_blank\" rel=\"noopener\">V1020<\/a>) and XLT or ULT types resist low-molecular-weight carbonyls, while standard FKM does not.<\/li>\n<li><strong>Aromatic and chlorinated hydrocarbons:<\/strong> standard FKM performs well here. By contrast, EPDM and NBR swell badly.<\/li>\n<li><strong>Strong bases, caustics, and amines:<\/strong> standard FKM types are not recommended. Instead, choose Viton\u00ae ETP (Marco <a href=\"https:\/\/www.marcorubber.com\/store\/compound\/V1020\" target=\"_blank\" rel=\"noopener\">V1020<\/a>), <a href=\"https:\/\/www.marcorubber.com\/aflas-o-rings.htm\" target=\"_blank\" rel=\"noopener\">Aflas\u00ae<\/a>, or <a href=\"https:\/\/www.marcorubber.com\/markez-ffkm.htm\" target=\"_blank\" rel=\"noopener\">FFKM<\/a>.<\/li>\n<li><span style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 1rem;\"><strong>Mixed or unknown streams:<\/strong> FFKM perfluoroelastomer is the safest choice. For example, <a href=\"https:\/\/www.marcorubber.com\/store\/compound\/Z1028\" target=\"_blank\" rel=\"noopener\">Markez\u00ae Z1028 <\/a><\/span>offers wide chemical compatibility to 610\u00b0F. Similarly, <a href=\"https:\/\/www.marcorubber.com\/store\/compound\/Z1352\" target=\"_blank\" rel=\"noopener\">Z1352<\/a> offers an almost universal chemical compatibility and is recommended for use in chem sprayers, injectors, and reactors.<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For harsh chemical service, <a href=\"https:\/\/www.marcorubber.com\/spring-energized-seals.htm\" target=\"_blank\" rel=\"noopener\">spring-energized PTFE seals<\/a> and <a href=\"https:\/\/www.marcorubber.com\/teflon-encapsulated-o-rings.htm\" target=\"_blank\" rel=\"noopener\">FEP-encapsulated O-rings<\/a> are proven alternatives to FFKM. Before finalizing, always confirm ratings in Marco&#8217;s <a href=\"https:\/\/www.marcorubber.com\/o-ring-chemical-compatibility-chart.htm\" target=\"_blank\" rel=\"noopener\">chemical compatibility chart<\/a> and its list of <a href=\"https:\/\/www.marcorubber.com\/chemical-compatibility\" target=\"_blank\" rel=\"noopener\">chemically compatible compounds and products<\/a>.<\/span><\/p>\n<h2><strong>Elastomer Materials by Industry and Application<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Visit our <a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1135\">Complete Guide to Elastomer Seal Materials<\/a> to consult our quick reference tables for typical temperature ranges and elastomer seal materials by application. Read on to find application-specific recommendations for other industries.<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1149\" target=\"_blank\" rel=\"noopener\">Elastomer Seal Materials for Medical Device &amp; Pharmaceutical Processing<\/a><\/li>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1155\" target=\"_blank\" rel=\"noopener\">Food and Beverage: O-Ring Materials Approved for Direct Food Contact<\/a><\/span><\/li>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1160\" target=\"_blank\" rel=\"noopener\">Plasma-Resistant Seals and Elastomer Seal Materials for Semiconductor Fabs<\/a><\/span><\/li>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1163\" target=\"_blank\" rel=\"noopener\">Elastomer Seal Materials for Oil &amp; Gas: Subsea, Sour Gas, and Refinery Service<\/a><\/span><\/li>\n<li><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1173\" target=\"_blank\" rel=\"noopener\">Aerospace &amp; Defense: MIL-SPEC O-Ring Materials for Fuel, Hydraulics, and Cold<\/a><\/span><\/li>\n<li><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1180\" target=\"_blank\" rel=\"noopener\">Elastomer Seal Materials for Automotive &amp; Industrial Equipment<\/a><\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.marcorubber.com\/inquiry-quote.htm\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-905\" src=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2026\/04\/Request-Quote-CTA.png\" alt=\"Request a quote for FFKM with tight lead times.\" width=\"1028\" height=\"280\" srcset=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2026\/04\/Request-Quote-CTA.png 1028w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2026\/04\/Request-Quote-CTA-300x82.png 300w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2026\/04\/Request-Quote-CTA-1024x279.png 1024w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2026\/04\/Request-Quote-CTA-768x209.png 768w\" sizes=\"auto, (max-width: 1028px) 100vw, 1028px\" \/><\/a><br \/>\n&#8212;<\/p>\n<h3>Related Reading<\/h3>\n<p><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/o-ring-size-chart-index.htm\" target=\"_blank\" rel=\"noopener\">Standard O-Ring Size Charts<\/a><\/span><br \/>\n<span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/o-ring-groove-design-directory.htm\" target=\"_blank\" rel=\"noopener\">O-Ring Groove Design Guides<\/a><\/span><br \/>\n<span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/custom-sealing-solutions.htm\" target=\"_blank\" rel=\"noopener\">Custom Sealing Solutions &#8211; From Prototype to Production<\/a><\/span><br \/>\n<span style=\"font-weight: 400;\"><a href=\"https:\/\/www.marcorubber.com\/blog\/?p=1016\" target=\"_blank\" rel=\"noopener\">Engineered Sealing Solutions: Your Questions About Custom O-Rings, Compounds &amp; Assemblies, Answered<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chemical-resistant seals rarely face just one chemical. Over its life, a single pump or valve may see solvents, acids, caustics, and cleaning agents. Consequently, a seal that handles one stream can fail quickly in the next. This article explains how to choose seal materials by solvent family, from ketones and aromatics to strong bases and [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":1145,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1167","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chemical-Resistant Seals for Aggressive Solvents<\/title>\n<meta name=\"description\" content=\"Match chemical-resistant seals to ketones, aromatics, caustics, and amines. Compare FFKM, Viton ETP, Aflas, and PTFE-based options.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.marcorubber.com\/blog\/?p=1167\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chemical-Resistant Seals for Aggressive Solvents\" \/>\n<meta property=\"og:description\" content=\"Match chemical-resistant seals to ketones, aromatics, caustics, and amines. 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