{"product_id":"富斯樂-fosroc-supercast-sw20","title":"Fosroc Supercast SW20","description":"\u003cdiv class=\"tldr-box\" style=\"background:#f0f4f8;border-left:4px solid #2c5282;padding:16px;margin-bottom:24px\"\u003e\n\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cp\u003eSupercast SW20 is a Fosroc high-performance hydrophilic swellable waterstop made from synthetic elastomer. Installed in cast-in-situ concrete construction joints, it swells on contact with water to create positive pressure against the joint faces, effectively preventing water passage. Features a delayed swell action to avoid premature swelling during construction. Simple adhesive-bonded installation suits complex locations where conventional PVC waterstops are difficult to detail. Red rectangular-section strip, BBA certified and approved for contact with potable water (per manufacturer).\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eSupercast SW20 is part of the Fosroc Supercast SW range of hydrophilic swellable waterstops, manufactured from high-performance synthetic elastomer strips. The swelling action results from contact between water and hydrophilic groups that are an integral part of the polymeric structure. These groups are not subject to extraction and maintain swelling performance through prolonged or repeated wetting. Expansion creates positive pressure against the concrete joint faces to prevent water passage. Swelling in fresh concrete is minimal, with a delayed swell action that helps prevent premature swelling during wet site conditions.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEasy installation\u003c\/strong\u003e — bond with adhesive or cast into joint faces; no complex shuttering required\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDamp substrate application\u003c\/strong\u003e — Supercast SWX and SW Adhesive can be applied to damp surfaces\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eComplex detailing\u003c\/strong\u003e — can be linked to Supercast PVC waterstops to maintain network continuity\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eReversible swelling\u003c\/strong\u003e — performance unaffected by long-term wet\/dry cycling\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSalt tolerant\u003c\/strong\u003e — suitable for use in concrete and groundwater containing salts\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSustained seal\u003c\/strong\u003e — maintains effective sealing in wet conditions\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHighly adaptable\u003c\/strong\u003e — rectangular-section strip accommodates complex joint shapes\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDelayed swell design\u003c\/strong\u003e — prevents premature swelling in wet site environments after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIntegral sealing of construction joints in cast-in-situ concrete\u003c\/li\u003e\n\u003cli\u003eComplex locations where conventional PVC waterstops are difficult to install\u003c\/li\u003e\n\u003cli\u003eDiaphragm wall and secant piled basement structures\u003c\/li\u003e\n\u003cli\u003ePile cap waterproofing\u003c\/li\u003e\n\u003cli\u003eJoints between new and existing concrete\u003c\/li\u003e\n\u003cli\u003ePipe entry waterstop detailing\u003c\/li\u003e\n\u003cli\u003eVertical construction joints and kicker joints\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCertifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBritish Board of Agrement (BBA) Certificate No. 5450 (per manufacturer)\u003c\/li\u003e\n\u003cli\u003eApproved for contact with potable water per BS 6920:2014 and WRAS certified (per manufacturer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplication Guidelines\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSurface preparation\u003c\/strong\u003e — concrete substrate must be clean and free of standing water\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCut and install\u003c\/strong\u003e — cut to required length and bond to joint face with Supercast SWX or SW Adhesive\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRough surfaces\u003c\/strong\u003e — use Supercast SWX adhesive on rough concrete surfaces\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eJointing\u003c\/strong\u003e — use butt joints; overlap or sidelap joints are not recommended\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAdhesive curing\u003c\/strong\u003e — allow adhesive to fully cure before placing concrete; do not immerse during curing\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePre-pour inspection\u003c\/strong\u003e — check for detachment, displacement or distortion from premature swelling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePackaging\u003c\/h2\u003e\n\u003cp\u003eRed rectangular-section strip, supplied in rolls\u003c\/p\u003e\n\n\u003ch2\u003eNotes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNot suitable for expansion joints or joints subject to significant movement\u003c\/li\u003e\n\u003cli\u003eSwell rate is affected by water quality and temperature\u003c\/li\u003e\n\u003cli\u003eDo not use where free unrestrained swelling can occur or for free-standing walls\u003c\/li\u003e\n\u003cli\u003eMust not be immersed in water before concrete placement, though SW20 tolerates short-term damp exposure\u003c\/li\u003e\n\u003cli\u003eNo known health hazards in normal use (per manufacturer)\u003c\/li\u003e\n\u003cli\u003eShelf life: twelve months in original unopened packaging stored in cool, dry conditions (per manufacturer)\u003c\/li\u003e\n\u003cli\u003eFor detailed application methods, coverage rates and technical parameters, refer to the official product data sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between SW20 and SWX?\u003c\/h3\u003e\n\u003cp\u003eSW20 is a pre-formed waterstop strip for primary sealing of long, straight construction joints. SWX is a gun-applied swellable paste that can serve as adhesive for SW20 and also as a standalone waterstop for irregular shapes and detailed locations. SW20 for straight joints, SWX for complex details — they are often used together.\u003c\/p\u003e\n\n\u003ch3\u003eWhat advantages does it have over conventional PVC waterstops?\u003c\/h3\u003e\n\u003cp\u003eSW20 is much simpler to install — just bond or nail-fix in place without complex formwork. Conventional PVC waterstops must be pre-fixed within shuttering, requiring more labour. SW20 is particularly suited to locations where traditional waterstops are difficult to install, such as diaphragm walls, secant pile basements, pile caps and irregular joints.\u003c\/p\u003e\n\n\u003ch3\u003eWhich to choose: SW10, SW20 or SW30?\u003c\/h3\u003e\n\u003cp\u003eThe three grades differ in cross-section dimensions and swell ratios, suited to different water pressure and concrete cover requirements. SW20 is the most commonly used grade and is BBA certified. Select the appropriate grade per engineering drawings, or contact us via WhatsApp.\u003c\/p\u003e\n\n\u003ch3\u003eHow much does it cost?\u003c\/h3\u003e\n\u003cp\u003ePlease contact us via WhatsApp for pricing. Available for pickup at our Mong Kok store or delivery within Hong Kong.\u003c\/p\u003e","brand":"Fosroc 富斯樂","offers":[{"title":"Default Title","offer_id":43647069552790,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/fosroc-logo-high-performance-sealing-products.jpg?v=1760463941","url":"https:\/\/wahhingwp.com\/en\/products\/%e5%af%8c%e6%96%af%e6%a8%82-fosroc-supercast-sw20","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}