{"product_id":"eptfe-h-cell-gaskets","title":"ePTFE H-Cell Gaskets","description":"\u003ch2 id=\"product-oneliner\"\u003eExpanded PTFE Gaskets, a Chemically Resistant Sealing for Acidic, Alkaline \u0026amp; Polar Electrolytes\u003c\/h2\u003e\n\u003cp class=\"text-center\"\u003eA reliable H-cell flange seal across the full pH range, from strongly acidic to strongly caustic to highly polar electrolytes\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"text-center\"\u003e\u003ca href=\"#specification\"\u003eSpecifications\u003c\/a\u003e | \u003ca href=\"#gallery\"\u003eGallery\u003c\/a\u003e | \u003ca href=\"#pricing\"\u003ePricing\u003c\/a\u003e | \u003ca href=\"#related-products\"\u003eRelated Products\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eExpanded PTFE (ePTFE) flange gaskets provides an airtight and leak-proof joint between the chambers or glass flanges of an H-type electrochemical cell across the full pH range, from strongly acidic to strongly caustic electrolytes, and highly polar conditions under which standard silicone and fluoroelastomer seals degrade over time.\u003c\/p\u003e\n\u003cp\u003eePTFE is manufactured by stretching solid PTFE to create a porous, fibrous microstructure. This gives it excellent compressibility and conformability, allowing the gasket to fill surface irregularities at the cell flange interface and maintain a fluid-tight seal even under moderate clamping force. Unlike solid PTFE, which can be too rigid to seal uneven or lightly compressed joints, ePTFE conforms readily while retaining the chemical inertness PTFE is known for. \u003c\/p\u003e\n\u003cp\u003eThis near-universal chemical resistance stems from the strong carbon-fluorine bonds in the PTFE backbone, which shield the material from chemical attack, so it withstands against swelling, softening, or degradation for longer duration regardless of electrolyte pH. This makes ePTFE gaskets suitable for a broad range of H-cell applications:  acidic electrolytes, alkaline water electrolysis, KOH-based systems. Crucially, ePTFE also holds up well against polar solvents, an environment where elastomeric gaskets such as FKM can swell or lose integrity, making it a reliable choice for non-aqueous electrochemistry using solvents like acetonitrile or DMF.\u003c\/p\u003e\n\u003cp\u003eBecause ePTFE is chemically inert rather than simply resistant, it does not leach plasticizers, curing residues, or degradation byproducts into the electrolyte. This is particularly valuable for contamination-sensitive work such as trace-level electroanalysis, spectroelectrochemistry, or long-duration stability testing, where even minor leaching can introduce background signal or compromise data integrity.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eImportant Limitation:\u003c\/strong\u003e As ePTFE seals via permanent compression rather than elastic recovery, gaskets are recommended be replaced each time the cell is disassembled (rather than reused).\u003c\/p\u003e\n\u003cp\u003eNote: Please check the whether the dimensions of the gasket fits your H-cell window before ordering. \u003c\/p\u003e\n\u003cdiv class=\"row display-flex\"\u003e\n\u003cdiv class=\"col-xs-12 col-sm-4 col-md-3 text-center margin-top\"\u003e\n\u003cimg loading=\"lazy\" width=\"50\" height=\"50\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/safe-enviroment-icon.svg\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eNear-universal chemical resistance\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eAcross the full pH range, from acids to strong bases, and polar solvants\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-xs-12 col-sm-4 col-md-3 text-center margin-top\"\u003e\n\u003cimg loading=\"lazy\" width=\"50\" height=\"50\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/lock-sealing-icon.svg\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eEffective Sealing\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eSupports uneven or lightly compressed flange surfaces\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-xs-12 col-sm-4 col-md-3 text-center margin-top\"\u003e\n\u003cimg loading=\"lazy\" width=\"50\" height=\"50\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/chemically-inert-icon.svg\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eChemically Inert\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eSuitable for contamination-sensitive electrochemical work\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-xs-12 col-sm-4 col-md-3 text-center margin-top\"\u003e\n\u003cimg loading=\"lazy\" width=\"50\" height=\"50\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/ring-gasket-icon.svg\"\u003e\n\u003cp class=\"blue-heading no-margin text-center\"\u003eStandard Size\u003c\/p\u003e\n\u003cp class=\"text-center\"\u003eFits standard modular electrochemical dual-chamber setups\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"specification\"\u003eSpecifications\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 56.8592%;\"\u003eProduct Name\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003eePTFE H-Cell Gaskets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eSKU\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003eC2055P1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eMaterial\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003eExpandable PTFE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eWindow Diameter\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eThickness\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003e1.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eColour\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 56.8592%;\"\u003eNumber of Gaskets in a set\u003c\/th\u003e\n\u003ctd style=\"width: 42.7798%;\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cfigure\u003e\u003cimg width=\"636\" loading=\"lazy\" height=\"438.75\" alt=\"H-Cell Gaskets Dimension Diagram\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/membrane-gasket-seal-dimensions.svg?\u0026amp;width=636\"\u003e\n\u003cfigcaption\u003eH-Cell Gaskets Dimension Diagram\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003ch2 id=\"gallery\"\u003eePTFE H-Cell Gaskets Gallery\u003c\/h2\u003e\n\u003chr\u003e\n\u003cdiv class=\"carousel-container carousel-gallery\"\u003e\n\u003cdiv class=\"carousel-track ease-in-out-transition\" style=\"transform: translateX(-1290px);\"\u003e\n\u003ca title=\"ePTFE H-Cell\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/h-cell-membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/h-cell-membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE H-Cell\"\u003e \u003c\/a\u003e\u003ca title=\"ePTFE Membrane Gasket Seal\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/eptfe-membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/eptfe-membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE Membrane Gasket Seal\"\u003e \u003c\/a\u003e\u003ca title=\"ePTFE H-Cell Gaskets\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE H-Cell Gaskets\"\u003e \u003c\/a\u003e \u003ca title=\"H-Cell Gasket\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/expanded-polytetrafluoroethylene-h-cell-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/expanded-polytetrafluoroethylene-h-cell-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"H-Cell Gasket\"\u003e \u003c\/a\u003e \u003ca title=\"ePTFE H-Cell\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/h-cell-membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/h-cell-membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE H-Cell\"\u003e \u003c\/a\u003e \u003ca title=\"ePTFE Membrane Gasket Seal\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/eptfe-membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/eptfe-membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE Membrane Gasket Seal\"\u003e \u003c\/a\u003e \u003ca title=\"ePTFE H-Cell Gaskets\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/membrane-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/membrane-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"ePTFE H-Cell Gaskets\"\u003e \u003c\/a\u003e\u003ca title=\"H-Cell Gasket\" href=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/expanded-polytetrafluoroethylene-h-cell-gasket-seal.jpg?width=1024\" class=\"carousel-item\"\u003e \u003cimg width=\"420\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/expanded-polytetrafluoroethylene-h-cell-gasket-seal.jpg?width=420\u0026amp;height=280\u0026amp;crop=center\" loading=\"lazy\" height=\"280\" alt=\"H-Cell Gasket\"\u003e \u003c\/a\u003e\n\u003c\/div\u003e\n\u003ca class=\"carousel-left-control\" role=\"button\"\u003e \u003csvg class=\"icon icon-chevron-left\"\u003e\u003cuse href=\"#icon-chevron-left\"\u003e\u003c\/use\u003e\u003c\/svg\u003e \u003cspan class=\"sr-only\"\u003ePrevious\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"carousel-right-control\" role=\"button\"\u003e \u003csvg class=\"icon icon-chevron-right\"\u003e\u003cuse href=\"#icon-chevron-right\"\u003e\u003c\/use\u003e\u003c\/svg\u003e \u003cspan class=\"sr-only\"\u003eNext\u003c\/span\u003e \u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"pricing\"\u003ePricing and Options\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eProduct Name\u003c\/th\u003e\n\u003cth width=\"30.9%\"\u003eProduct Code\u003c\/th\u003e\n\u003cth width=\"30.9%\"\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eePTFE H-Cell Gaskets\u003c\/td\u003e\n\u003ctd\u003eC2055P1\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ossila-currency-exchange\" data-gbp-price=\"25\" data-nosnippet=\"true\"\u003e£25\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 id=\"related-products\"\u003eRelated Products\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e[[collection handle=\"\" tags=\"\" limit=\"5\"]]\u003c\/p\u003e\n\u003cdiv class=\"collection-container\"\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"\/collections\/electrochemical-cells\"\u003e\n\u003cdiv class=\"collection-button background-ossila-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/electrochemical-cell-collection-design.png?v=1715167619\" loading=\"lazy\" height=\"109\" alt=\"Electrochemical Cell Collection\"\u003e\n\u003cp\u003e\u003cstrong\u003eElectrochemical Cells\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"\/collections\/photoelectrochemical-cells\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/Photoelectrochemical-cells-collection-design.png?v=1715167619\" loading=\"lazy\" height=\"109\" alt=\"Photoelectrochemical Cell Collection\"\u003e\n\u003cp\u003e\u003cstrong\u003ePhotoelectrochemical\u003cbr\u003eCells\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"\/collections\/electrodes\"\u003e\n\u003cdiv class=\"collection-button background-ossila-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/Electrode-collection-design.png?v=1715167618\" loading=\"lazy\" height=\"109\" alt=\"Electrochemical Cell Collection\"\u003e\n\u003cp\u003e\u003cstrong\u003eElectrodes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ossila","offers":[{"title":"Pack of 10","offer_id":52154839531736,"sku":"C2055P1","price":38.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/eptfe-h-cell-gaskets-product-photo.jpg?v=1785758380","url":"https:\/\/www.ossila.com\/products\/eptfe-h-cell-gaskets","provider":"Ossila","version":"1.0","type":"link"}