{"product_id":"mapei-idrostop-25","title":"Mapei Idrostop 25","description":"\u003csection class=\"description-generic margin-bottom-md\"\u003e\n\u003csection class=\"description-generic margin-bottom-md\"\u003e\n\u003cdiv class=\"col-sm-10 col-sm-push-1 col-xs-12\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6 col-xs-12 no-padding-xs\"\u003e\n\u003cdiv class=\"ProductDescription margin-xs-top-md\" style=\"text-align: start;\"\u003e\n\u003csection class=\"description-generic margin-bottom-md\"\u003e\n\u003csection class=\"description-generic margin-bottom-md\"\u003e\n\u003ch2\u003e\u003cspan\u003eIdrostop 25 – Hydrophilic Expanding Rubber Waterstop 20 x 25mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIdrostop 25\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a pre-formed hydrophilic expanding rubber waterstop designed to create watertight construction joints in concrete structures. It gradually expands when in permanent contact with water, forming an active barrier against water penetration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease call for other sizes which are available \u003ca href=\"tel:01268472358\" title=\"call clever shield\"\u003e\u003cstrong\u003e01268 472358\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003e20x10 mm (Idrostop 10) 20x15 mm (Idrostop 15)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is suitable for civil, industrial and hydraulic construction, including construction joints between concrete sections and contact joints between different materials. Unlike Idrostop B25, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIdrostop 25 is an expanding rubber waterstop and does not contain bentonite\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/idrostop-10.png?v=1791284738\" alt=\"Mapei Idrostop 25 hydrophilic expanding rubber waterstop 20 x 25mm for waterproofing concrete construction joints.\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHydrophilic expanding rubber waterstop\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for watertight construction joints\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePre-formed flexible profile\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e20 x 25mm profile\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGradually expands when exposed to water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCreates an active barrier against pressurised water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for positive and negative water pressure\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDoes not contain bentonite\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for repeated expansion and contraction cycles\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for aggressive water environments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for civil, industrial and hydraulic construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCan be fixed using Idrostop Mastic, nails or screws\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for difficult-to-access construction joints\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNo waiting period before concrete casting when mechanically fixed\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdrostop 25 is suitable for watertight construction and contact joints in:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eConcrete base-to-wall joints\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eJoints between concrete pours\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eContact joints between different materials\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePVC pipes passing through concrete\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSteel pipes passing through concrete\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSwimming pools\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSewage-treatment tanks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWater reservoirs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHydraulic structures\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTunnels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDams\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDrinking-water reservoirs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConcrete structures with dense reinforcement\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Information\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Hydrophilic expanding rubber waterstop\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eForm:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Pre-formed strip\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Acrylic polymer-based expanding rubber\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSize:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 20 x 25mm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Idrostop 25\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eExpansion after 24 hours:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 45%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eExpansion after 2 days:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 70%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eExpansion after 3 days:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 82%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eExpansion after 7 days:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 120%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWater impermeability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 5 atm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElongation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 70–100%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eShore hardness:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 25–30\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature stability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e -30°C to +50°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaximum joint width:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 7mm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStorage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 12 months\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePackaging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 6 x 5m rolls per box\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTotal per box:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 30 linear metres\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdrostop 25 is installed onto a clean, solid substrate within the construction joint. It can be secured using \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIdrostop Mastic\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e or mechanically using suitable nails or screws.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen Idrostop Mastic is used, a 24-hour waiting period is required before concrete casting. When mechanically fixed using nails or screws, no waiting period is required before casting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe product should not be installed while the structure is immersed in water, and free water should be removed from the installation area before application.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e1. What is Idrostop 25 used for?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIdrostop 25 is used to create watertight construction joints in concrete structures, including civil, industrial and hydraulic applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e2. Is Idrostop 25 a bentonite waterstop?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. Idrostop 25 is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ehydrophilic expanding rubber waterstop\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. It should not be confused with Idrostop B25, which is a separate bentonite-based product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e3. What size is Idrostop 25?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIdrostop 25 has a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e20 x 25mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e cross-section and is supplied in 5m rolls. Six rolls are supplied per box, providing 30 linear metres.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e4. How does Idrostop 25 work?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe rubber profile gradually expands when it comes into permanent contact with water. This expansion creates an active barrier that helps prevent water from passing through the construction joint.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e5. Can Idrostop 25 be used in aggressive water conditions?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eYes. Idrostop 25 is designed to maintain its performance through repeated expansion and contraction cycles and is suitable for aggressive water environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Limitations\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdrostop 25 should not be installed while the structure is immersed in water. Free water should be removed before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe maximum specified joint width is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e7mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The installation surface must be clean and solid and should not be heavily contaminated with acids or solvents.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"text-base description-adv text-brand text-weight-700 margin-bottom-md\"\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eDownloads\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e\n\u003csection class=\"description-tecnici margin-bottom-md\"\u003e\n\u003cdiv class=\"text-smedium\"\u003e\n\u003cdiv class=\"container-fluid bg-grey-white is-shadowed\"\u003e\n\u003cdiv class=\"container container-padded padding-top-big\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-10 col-sm-offset-1 col-xs-12\"\u003e\n\u003cp class=\"h4 text-center text-weight-700\"\u003eTechnical data sheet\u003clabel class=\"lb-hover\"\u003e\u003c\/label\u003e\u003c\/p\u003e\n\u003cdiv class=\"padding-top-big padding-bottom-big\"\u003e\n\u003cdiv class=\"d-flex flex-wrap flex-column flex-md-row justify-content-between box-attached-documentation thumbnail thumbnail-white padding-vertical-sm no-border text-center with-shadow\"\u003e\n\u003cdiv class=\"col-xs-12 flex-1 d-flex justify-content-start justify-content-sm-end\"\u003e\n\u003cdiv class=\"box-attached-documentation-tools padding-horizontal-md no-padding-sm-horizontal no-padding-xs-horizontal flex-1 flex-wrap flex-sm-nowrap d-flex justify-content-end\"\u003e\n\u003ca href=\"https:\/\/cdnmedia.mapei.com\/docs\/librariesprovider14\/products-documents\/1_07482_purtop-easy_en_764e2be22fe5432693000d83c0ab666b.pdf?sfvrsn=c1d61229_0\" class=\"tds-download btn btn-block btn-primary text-bold text-base margin-right-md margin-left-md margin-bottom-sm margin-top-sm\" title=\"Aquaflex Roof Data Sheet\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan class=\"pull-right mapei-icon mapei-icon-save-big\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003cdiv class=\"text-left text-uppercase\"\u003e\n\u003ca rel=\"noopener\" title=\"IDROSTOP Waterbar Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/IDROSTOP_DATA_SHEET.pdf?v=1730467954\" target=\"_blank\"\u003eDown\u003c\/a\u003e\u003ca href=\"https:\/\/cdnmedia.mapei.com\/docs\/librariesprovider25\/products-documents\/1_00411_idrostop_en_2bbc282e6a104fdc8b67ff7e14a4511e.pdf?sfvrsn=70c40ade_0\" title=\"IDROSTOP Waterbar Data Sheet\" rel=\"noopener\" target=\"_blank\"\u003el\u003c\/a\u003e\u003ca rel=\"noopener\" title=\"IDROSTOP Waterbar Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/IDROSTOP_DATA_SHEET.pdf?v=1730467954\" target=\"_blank\"\u003eoad\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"text-left text-uppercase\"\u003e\n\u003cdiv class=\"container-fluid 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class=\"container-fluid bg-grey-white is-shadowed\"\u003e\n\u003cdiv class=\"container container-padded padding-top-md padding-bottom-big\"\u003e\n\u003cdiv class=\"row padding-bottom-big\"\u003e\n\u003cdiv class=\"col-sm-10 col-sm-offset-1 col-xs-12\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-xs-12 col-no-float-print\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"d-flex flex-wrap flex-column flex-md-row justify-content-between box-attached-documentation thumbnail thumbnail-white padding-vertical-sm no-border text-center with-shadow\"\u003e\n\u003cdiv class=\"col-xs-12 flex-1 d-flex justify-content-start justify-content-sm-end\"\u003e\n\u003cdiv class=\"box-attached-documentation-tools padding-horizontal-md no-padding-sm-horizontal no-padding-xs-horizontal flex-1 flex-wrap flex-sm-nowrap d-flex justify-content-end\"\u003e\n\u003cdiv class=\"sds-helper-selector helper-wrapper d-flex w-auto\"\u003e\n\u003cdiv class=\"text-left text-uppercase\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"Mapei","offers":[{"title":"20 × 25mm x 6 Rolls","offer_id":57514232480119,"sku":"IDROSTOPB25","price":576.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/idrostop-waterbar-watertight-concrete-seal-164.webp?v=1765891663","url":"https:\/\/clevershieldcoatings.co.uk\/products\/mapei-idrostop-25","provider":"Clever Shield - Asset Protection","version":"1.0","type":"link"}