{"id":625,"date":"2025-04-23T17:53:09","date_gmt":"2025-04-23T17:53:09","guid":{"rendered":"https:\/\/www.marcorubber.com\/blog\/?p=625"},"modified":"2025-04-23T17:54:07","modified_gmt":"2025-04-23T17:54:07","slug":"why-chemical-compatibility-matters-in-seals","status":"publish","type":"post","link":"https:\/\/www.marcorubber.com\/blog\/?p=625","title":{"rendered":"Why Chemical Compatibility Matters in Seals"},"content":{"rendered":"<h1><span style=\"font-weight: 400;\">Why Chemical Compatibility Matters in Seals<\/span><\/h1>\n<p><span style=\"font-weight: 400;\">Seals may be small, but they play a massive role in keeping industrial systems running smoothly. Seals must withstand exposure to various chemicals without degrading in chemical processing, pharmaceuticals, aerospace, food production, and several other applications. If the wrong seal material is used, the results can range from minor inefficiencies to catastrophic equipment failure.<\/span><\/p>\n<p><b>Chemical compatibility affects performance, longevity, and safety<\/b><span style=\"font-weight: 400;\">. A well-matched seal material resists harmful chemical interactions while maintaining its shape and flexibility. It continues to function even under extreme temperatures and pressures. On the other hand, an incompatible seal can swell, crack, dissolve, or break down entirely, leading to costly downtime, leaks, contamination, and even safety hazards.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Choosing the right material isn\u2019t just about making a seal work\u2014it\u2019s about ensuring it works reliably over time. By understanding how different seal materials interact with specific chemicals, industries can avoid premature failures, reduce maintenance costs, and improve operational efficiency.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-628\" src=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2-1024x768.jpg\" alt=\"broken seal\" width=\"800\" height=\"600\" srcset=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2-1024x768.jpg 1024w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2-300x225.jpg 300w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2-768x576.jpg 768w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2-1536x1152.jpg 1536w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog2.jpg 1600w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><b>Potential Issues Caused by Poor Compatibility<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Using a seal material that isn\u2019t chemically compatible with its environment can lead to a variety of failures. Here are the most common issues:<\/span><\/p>\n<h3><b>1. Swelling<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some elastomers absorb chemicals, causing them to expand. This swelling can increase friction in dynamic applications, make assembly difficult, and prevent the seal from maintaining a proper fit.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common causes:<\/b><span style=\"font-weight: 400;\"> Exposure to fuels, acids, solvents, or oils that permeate the elastomer structure.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why it\u2019s a problem:<\/b><span style=\"font-weight: 400;\"> The component becomes too large, loses flexibility, and can no longer maintain a tight seal.<\/span><\/li>\n<\/ul>\n<h3><b>2. Dissolution<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Certain chemicals can actually break down and dissolve the seal material, weakening its structure and causing premature failure.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common causes:<\/b><span style=\"font-weight: 400;\"> Strong acids, aggressive solvents, or high-pH cleaners attacking incompatible materials.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why it\u2019s a problem:<\/b><span style=\"font-weight: 400;\"> If a seal degrades or dissolves, it loses its ability to contain fluids, leading to leaks and contamination.<\/span><\/li>\n<\/ul>\n<h3><b>3. Cracking and Brittleness<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Chemical exposure can cause some elastomers to become brittle, crack, or develop surface fissures, eventually leading to leaks. This is especially common in applications with ozone, UV exposure, or aggressive cleaning agents.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common causes:<\/b><span style=\"font-weight: 400;\"> Harsh chemicals, oxidation, or prolonged exposure to ozone.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why it\u2019s a problem:<\/b><span style=\"font-weight: 400;\"> Cracked seals can no longer provide an effective barrier, leading to leaks and potential safety hazards.<\/span><\/li>\n<\/ul>\n<h3><b>4. Discoloration<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">A visible color change in a seal may seem like a minor issue, but it can be an early sign of chemical degradation. Discoloration can also indicate contamination risks in industries like food and beverage, pharmaceuticals, and medical devices.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common causes:<\/b><span style=\"font-weight: 400;\"> Chemical reactions between the seal material and process fluids, heat exposure, or UV light.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why it\u2019s a problem:<\/b><span style=\"font-weight: 400;\"> In some industries, a discolored seal may signal degradation or contamination, requiring replacement before performance is affected.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-631\" src=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3-1024x768.jpg\" alt=\"Common Seal Materials for Chemical Compatibility \" width=\"800\" height=\"600\" srcset=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3-1024x768.jpg 1024w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3-300x225.jpg 300w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3-768x576.jpg 768w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3-1536x1152.jpg 1536w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog3.jpg 1600w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><b>Common Seal Materials for Chemical Compatibility<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">So which sealing materials offer the best chemical compatibility? We routinely recommend a few, depending on the types of chemicals in your application.\u00a0<\/span><\/p>\n<h3><b>FFKM (Perfluoroelastomer)<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why?<\/b><span style=\"font-weight: 400;\"> FFKM offers near-universal chemical resistance, withstanding strong acids, bases, solvents, and hydrocarbons. It also maintains elasticity in extreme conditions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Best For:<\/b><span style=\"font-weight: 400;\"> Harsh chemical environments where standard elastomers fail, as well as applications requiring high temperatures (up to 600\u00b0F\/315\u00b0C).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common Uses:<\/b><span style=\"font-weight: 400;\"> Semiconductor manufacturing, chemical processing, pharmaceutical seals, and aerospace.<\/span><\/li>\n<\/ul>\n<h3><b>FKM (Viton\u00ae)<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why?<\/b><span style=\"font-weight: 400;\"> FKM provides excellent resistance to fuels, oils, and many industrial chemicals. It also holds up well in high temperatures, making it a go-to for demanding applications.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Best For:<\/b><span style=\"font-weight: 400;\"> Applications that require flexibility, heat resistance (up to 400\u00b0F\/200\u00b0C), and protection against hydrocarbons, acids, and solvents.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common Uses:<\/b><span style=\"font-weight: 400;\"> Automotive, aerospace, industrial seals, and fuel system components.<\/span><\/li>\n<\/ul>\n<h3><b>PTFE (Polytetrafluoroethylene)<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why?<\/b><span style=\"font-weight: 400;\"> PTFE is chemically inert to nearly all chemicals, making it one of the most resilient sealing materials available. It also has an exceptionally wide temperature range (\u2212400\u00b0F to 600\u00b0F).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Best For:<\/b><span style=\"font-weight: 400;\"> Static seals, gaskets, chemical pumps, and applications involving highly aggressive fluids.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common Uses:<\/b><span style=\"font-weight: 400;\"> Chemical processing, aerospace, and food-and-beverage applications requiring non-contaminating, non-stick surfaces.<\/span><\/li>\n<\/ul>\n<h3><b>EPDM (Ethylene Propylene Diene Monome)<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why?<\/b><span style=\"font-weight: 400;\"> EPDM has excellent resistance to water, steam, and many acids and bases, making it ideal for common moisture exposure.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Best For:<\/b><span style=\"font-weight: 400;\"> Low-temperature applications, water-based chemical exposure, and environments with high-intensity steam or cleaning cycles.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common Uses:<\/b><span style=\"font-weight: 400;\"> Water treatment, food and beverage, medical devices, and pharmaceutical processing.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-630\" src=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4-1024x768.jpg\" alt=\"Chemical Compatibility Case Studies \" width=\"800\" height=\"600\" srcset=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4-1024x768.jpg 1024w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4-300x225.jpg 300w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4-768x576.jpg 768w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4-1536x1152.jpg 1536w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog4.jpg 1600w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><b>Chemical Compatibility Case Studies<\/b><\/h2>\n<h3><b>Reducing Costs in Mechanical Seal Applications With FFKM<\/b><\/h3>\n<h4><b>The Challenge<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Mechanical seals are widely used in high-speed rotary applications to prevent gas and liquid leaks. While the primary carbon-face seal does most of the dynamic sealing, a secondary internal o-ring is also required to prevent internal leakage.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Many companies rely on premium perfluoroelastomer (FFKM) seals such as Kalrez\u00ae and Chemraz\u00ae for these applications due to their exceptional chemical resistance and high-temperature durability. However, these materials come at a significant cost, making them a financial burden for manufacturers dealing with aggressive chemicals.<\/span><\/p>\n<h4><b>The Solution<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Marco Rubber provided a cost-effective alternative to traditional FFKM seals. The engineering team recommended Markez Z1028, a high-performance perfluoroelastomer capable of withstanding temperatures up to 600\u00b0F while maintaining resistance to a wide range of aggressive chemicals.<\/span><\/p>\n<h4><b>The Results<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">By switching to Markez Z1028\u00ae, manufacturers were able to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Reduce costs by 30% to 50%<\/b><span style=\"font-weight: 400;\"> compared to Kalrez\u00ae and Chemraz\u00ae o-rings.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maintain <\/span><b>high chemical resistance<\/b><span style=\"font-weight: 400;\"> and performance under extreme conditions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ensure <\/span><b>long-term reliability<\/b><span style=\"font-weight: 400;\"> in mechanical seal applications.<\/span><\/li>\n<\/ul>\n<p><b>Chemical compatibility allows manufacturers to cut costs without sacrificing performance.<\/b><\/p>\n<h3><b>High-Temperature Seal Solution for Injection Molding Equipment<\/b><\/h3>\n<h4><b>The Challenge<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">A manufacturer of high-temperature injection molding equipment was struggling with seal failures at 400\u00b0F caused by exposure to a variety of caustic chemicals. Standard elastomeric seals could not withstand the combination of extreme heat and aggressive chemical exposure, leading to frequent breakdowns and production downtime.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">With temperatures pushing the limits of conventional sealing materials, the manufacturer needed a reliable, long-lasting solution that could survive the harsh operating conditions.<\/span><\/p>\n<h4><b>The Solution<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Marco Rubber\u2019s engineering team recommended a proprietary high-temperature perfluoroelastomer (FFKM) compound\u2014Markez Z1028\u2014capable of handling temperatures up to 600\u00b0F while maintaining resistance to caustic chemicals. The team also reverse-engineered the existing seal design to ensure an exact fit with the injection equipment.<\/span><\/p>\n<h4><b>The Results<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">After extensive testing under maximum pressure and temperature conditions, the new Markez Z1028 seal passed all required performance tests and was approved for operation. The benefits included:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Improved reliability<\/b><span style=\"font-weight: 400;\"> in high-temperature, aggressive chemical environments;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Reduced downtime<\/b><span style=\"font-weight: 400;\"> by eliminating frequent seal failures; and<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Extended seal lifespan<\/b><span style=\"font-weight: 400;\">, lowering long-term maintenance costs.<\/span><\/li>\n<\/ul>\n<p><b>Choosing the right seal material\u2014particularly in high-stress environments\u2014can greatly improve efficiency and reliability in industrial applications.<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-627\" src=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5-1024x768.jpg\" alt=\"o rings\" width=\"800\" height=\"600\" srcset=\"https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5-1024x768.jpg 1024w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5-300x225.jpg 300w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5-768x576.jpg 768w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5-1536x1152.jpg 1536w, https:\/\/blog.marcorubber.com\/wp-content\/uploads\/2025\/04\/Marco_April25_MCC_Blog5.jpg 1600w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><b>Assessing Compatibility<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Choosing the right seal material is crucial to prevent failures, reduce downtime, and improve long-term performance in chemically aggressive environments.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Not sure which seal material is the best fit for your application? <\/span><a href=\"https:\/\/www.marcorubber.com\/o-ring-chemical-compatibility-chart.htm\"><span style=\"font-weight: 400;\">Explore our free Chemical Compatibility Guide<\/span><\/a><span style=\"font-weight: 400;\"> today to get expert insights on the best materials for your needs.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why Chemical Compatibility Matters in Seals Seals may be small, but they play a massive role in keeping industrial systems running smoothly. Seals must withstand exposure to various chemicals without degrading in chemical processing, pharmaceuticals, aerospace, food production, and several other applications. If the wrong seal material is used, the results can range from minor [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":629,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-625","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>Why Chemical Compatibility Matters in Seals | Marco Rubber and Plastics<\/title>\n<meta name=\"description\" content=\"Chemical compatibility is a critical component of seals. 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