--- title: What Is Methyl n-Propyl Ketone (MPK)? Applications, Benefits, and Uses description: Find out everything you need to know about composites and how they are used at GracoRoberts. Find out how composites are used in the aerospace industry. image: https://blog.gracoroberts.com/hubfs/MPk-Cleaner.png --- [![GracoRoberts](https://www.gracoroberts.com/resources/SilMid/images/WebPImages/GracoRoberts-Logo-White.webp)](https://www.gracoroberts.com/) Search [Sign In / Register Account And Quick Order](https://www.gracoroberts.com/account/) New Customer? 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Applications, Benefits, and Uses By  [GracoRoberts](https://blog.gracoroberts.com/author/gracoroberts)  ·  3 minute read Choosing the right solvent is a balance of performance, safety, and compliance. As manufacturers move away from higher-hazard options, methyl n-propyl ketone (MPK) has become a practical replacement in coatings, adhesives, cleaning, and surface preparation. This guide explains what MPK is, how it compares to methyl ethyl ketone (MEK), where it delivers the most value, and what to consider when sourcing it. ## **What Is Methyl n-Propyl Ketone (MPK)?**  ![This is a 3D ball-and-stick molecular model of MPK chemical formula](https://www.gracoroberts.com/Images/GracoRoberts%20Media%20Network/AdobeStock_547183199.jpeg)Methyl n-propyl ketone (MPK), also known as 2-pentanone, is a clear, colorless ketone solvent with a strong solvency for resins, coatings, and adhesives. It sits in the same solvent family as acetone and MEK but carries a higher flash point and lower volatility, which changes how it behaves on the shop floor. In practical terms, MPK dissolves a broad range of resins and polymers, evaporates at a controlled rate, and leaves a clean finish, making it a versatile fit for formulation and cleaning work. GracoRoberts supplies [Eastman MPK](https://www.gracoroberts.com/specialties/eastman-mpk-methyl-propyl-ketone-variant/)as an authorized Eastman distributor with global repackaging rights. ## **MPK vs. MEK: Why the Switch** MPK is most often discussed as an alternative to MEK. The two share strong solvency, but MPK offers meaningful advantages for handling, worker safety, and regulatory compliance. | **Property** | **MPK (Methl n-Propyl Ketone)** | **MEK (Methyl Ethyl Ketone)** | | --- | --- | --- | | Flash Point | Higher; safer to store and handle | Lower | | Volatility | Lower, more controlled evaporation | Higher, faster flash-off | | HAP Status | HAP-Free | Listed hazardous air pollutant | |   Solvency |   Strong, broad resin compatibility |   Strong | The headline differences: MPK's **higher flash point** reduces flammability risk in storage and use, its **lower volatility** gives formulators more control over evaporation and reduces solvent loss, and its **HAP-free** status simplifies air-quality compliance where hazardous air pollutants are regulated. For many operations, that combination lowers risk without giving up solvency.   ## **Where MPK Is Used** MPK's balance of solvency and controlled evaporation makes it valuable across several industries and process steps. - **Aerospace and composites.** Surface preparation, cleaning, and resin handling where a HAP-free solvent supports compliance on regulated production lines. - **Coatings and paints.** A slower-evaporating solvent that improves flow, leveling, and finish quality in industrial coating formulations. - **Adhesives and sealants.** Resin dissolution, viscosity control, and equipment cleanup during formulation and application. - **Electronics manufacturing.** Precision cleaning and residue removal where a clean, controlled evaporation profile matters. - **General industrial manufacturing.** Parts cleaning, degreasing, and process solvent applications that benefit from a higher flash point. MPK works alongside other materials in these workflows. Explore related [solvent cleaners](https://www.gracoroberts.com/cleaners/solvent-cleaners/), [specialty chemicals](https://www.gracoroberts.com/specialties/specialty-chemicals-for-aerospace/), and [adhesives](https://www.gracoroberts.com/adhesives/) to round out a process. ## **  Available Packaging Sizes** As an authorized Eastman distributor with global repackaging rights for MPK, GracoRoberts supplies the solvent in a range of sizes to match how much you actually use, from bench-scale bottles to production drums: ![Packaging options from bottles to drums for MPK](https://www.gracoroberts.com/Images/GracoRoberts%20Media%20Network/Eastman%20MPK%20Packaging%20Sizes.png) - 8 oz flip-top bottle - 16 oz flip-top bottle - 1 qt plastic bottle - 1 gal can - 5 gal pail - 360 lb drum Flexible sizing reduces waste, simplifies inventory, and keeps material fresh. If you need a size or format that fits a specific process, [request a specialty packaging consultation](https://landing.gracoroberts.com/specialty-packaging-consultation) to discuss options.   ## **Why Source Eastman MPK from GracoRoberts** The value of a solvent supplier is not just the chemistry, it is availability, documentation, and support. As an authorized Eastman distributor, GracoRoberts delivers: - **Flexible repackaging** in the sizes your process needs, backed by global repackaging rights for MPK. - **Domestic availability** and inventory to support production schedules and reduce lead-time risk. - **Full traceability** and documentation to support aerospace and industrial quality requirements. - **Technical support** to help match MPK to your application and specifications. See the Eastman MPK product page for current specifications and packaging, or [talk to our team](https://www.gracoroberts.com/contact/) about your solvent requirements.   ## **Frequently Asked Questions** ### **What is methyl n-propyl ketone (MPK) used for?** MPK is used as a solvent in coatings, paints, adhesives, and sealants, and for surface preparation, precision cleaning, and degreasing across aerospace, composites, electronics, and industrial manufacturing. Its controlled evaporation and strong solvency suit both formulation and cleaning. ### **What is the difference between MPK and MEK?** MPK (methyl n-propyl ketone) and MEK (methyl ethyl ketone) are both ketone solvents with strong solvency. MPK has a higher flash point, lower volatility, and is HAP-free, which makes it safer to handle and easier to comply with air-quality regulations, while MEK is a listed hazardous air pollutant. ### **Is MPK a HAP-free solvent?** Yes. MPK is not listed as a hazardous air pollutant (HAP), which can simplify environmental compliance compared with solvents such as MEK that are HAP-listed. ### **What is another name for MPK?** MPK is also known as 2-pentanone. Its full chemical name is methyl n-propyl ketone. ### **Can existing aerospace materials be used on eVTOL aircraft?What packaging sizes does MPK come in?** GracoRoberts repackages Eastman MPK in 8 oz and 16 oz flip-top bottles, 1 qt plastic bottles, 1 gal cans, 5 gal pails, and 360 lb drums, with custom options available through a specialty packaging consultation. 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Thermal management materials move heat away from critical components and protect surrounding structure, which is essential for performance, battery life, and safety." }, "name" : "Why is thermal management so important in eVTOL design?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Conformal coatings and potting or encapsulation compounds protect eVTOL electronics from moisture, vibration, contamination, and thermal cycling. Conformal coatings apply a thin protective film over circuit boards, while potting compounds fully encase components for mechanical support and environmental sealing." }, "name" : "What protects eVTOL electronics from the environment?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "eVTOL range and payload depend heavily on weight because battery energy density is limited. Every material choice, from adhesives that replace fasteners to lightweight thermal and protective compounds, is evaluated for the performance it delivers per unit of mass, so the materials stack is a continual balance of protection against weight." }, "name" : "Why is weight so critical for eVTOL materials selection?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Many proven aerospace adhesives, silicones, and coatings carry directly into eVTOL, but selection must account for the unique combination of high electrical loads, dense electronics, extensive composites, and aggressive weight targets. Materials should always be qualified against the specific design and its engineering requirements." }, "name" : "Can existing aerospace materials be used on eVTOL aircraft?" } ] } ``` ```json { "@context" : "http://schema.org", "@type" : "Article", "author" : { "@type" : "Person", "name" : [ "GracoRoberts" ], "url" : "https://blog.gracoroberts.com/author/gracoroberts" }, "datePublished" : "2026-09-16T21:46:28+0000", "description" : "Find out everything you need to know about composites and how they are used at GracoRoberts. Find out how composites are used in the aerospace industry.", "headline" : "What Is Methyl n-Propyl Ketone (MPK)? Applications, Benefits, and Uses", "image" : "https://2450241.fs1.hubspotusercontent-na1.net/hubfs/2450241/MPk-Cleaner.png", "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://2450241.fs1.hubspotusercontent-na1.net/hubfs/2450241/GracoRoberts-Logo-CMYK.png" }, "name" : "GracoRoberts" }, "url" : "https://blog.gracoroberts.com/what-is-methyl-n-propyl-ketone-mpk-applications-benefits-and-uses" } ```