{"product_id":"西卡永聯結-sika-ronacrete-unicell-40s-25kg","title":"Sika Ronacrete Unicell 40S","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\u003eUnicell 40S is a pre-bagged vinyl acetate copolymer modified Class 40 mortar by Sika Ronacrete, specifically designed for filling gaps around window frames, door frames, and fire shutter frames. Compliant with HKHA Class 40 RMS specification. Waterproof, shrinkage compensated. 25 kg bag.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eUnicell 40S — Class 40 Window Frame Waterproof Grout\u003c\/h2\u003e\n\u003cp\u003eUnicell 40S is a pre-packed vinyl acetate copolymer modified mortar requiring only the addition of clean water to produce a high-performance grout for filling gaps around window frames, door frames, and fire shutter frames. It conforms to the Hong Kong Housing Authority specification for Class 40 Repair Mortar System (HKHA Class 40 RMS). Suitable for thick section application in both structural and non-structural uses, with excellent waterproofing and water resistance properties.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCompliant with HKHA Class 40 Repair Mortar System specification\u003c\/li\u003e\n\u003cli\u003eHigh build application capability\u003c\/li\u003e\n\u003cli\u003eSimple to mix — just add water\u003c\/li\u003e\n\u003cli\u003ePre-packed for quality control and convenience\u003c\/li\u003e\n\u003cli\u003eSuitable for structural applications\u003c\/li\u003e\n\u003cli\u003eWaterproof and water resistant\u003c\/li\u003e\n\u003cli\u003eShrinkage compensated (no cracking in Coutinho Ring test)\u003c\/li\u003e\n\u003cli\u003eLow VOC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWindow frame to concrete gap filling\u003c\/li\u003e\n\u003cli\u003eDoor frame gap filling\u003c\/li\u003e\n\u003cli\u003eFire shutter frame gap filling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose Unicell 40S?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHKHA approved:\u003c\/strong\u003e Meets Class 40 RMS specification for public housing projects\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHigh strength:\u003c\/strong\u003e 28-day compressive strength exceeding 40 MPa\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWaterproof:\u003c\/strong\u003e Very low water absorption (28-day ISA \u0026lt;0.1 ml\/m\u0026sup2;\/s @ 10 min)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNon-shrink:\u003c\/strong\u003e No cracking in Coutinho Ring test from 1 to 28 days\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEasy to use:\u003c\/strong\u003e Pre-bagged formula, just add water and mix\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Consumption\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eItem\u003c\/th\u003e\u003cth\u003eSpecification\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003ePackaging\u003c\/td\u003e\u003ctd\u003e25 kg bag\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eColour\u003c\/td\u003e\u003ctd\u003eConcrete grey\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConsumption\u003c\/td\u003e\u003ctd\u003eApprox. 67 bags\/m\u0026sup3;\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eWater Addition\u003c\/td\u003e\u003ctd\u003e3.5-4.5 litres per 25 kg bag\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eShelf Life\u003c\/td\u003e\u003ctd\u003e9 months from date of production\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eStorage\u003c\/td\u003e\u003ctd\u003eUnopened original sealed packaging, cool dry conditions, protect from sunlight and frost\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eProperty\u003c\/th\u003e\u003cth\u003eUnicell 40S Typical Performance\u003c\/th\u003e\u003cth\u003eHKHA Specification (Class 40)\u003c\/th\u003e\u003cth\u003eTest Method\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eCompressive Strength (28 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;40 MPa\u003c\/td\u003e\u003ctd\u003e30-60 MPa\u003c\/td\u003e\u003ctd\u003eTM1\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eTensile Strength (7 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;2.0 MPa\u003c\/td\u003e\u003ctd\u003e\u0026ge;2.0 MPa\u003c\/td\u003e\u003ctd\u003eTM2\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eTensile Strength (28 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;2.5 MPa\u003c\/td\u003e\u003ctd\u003e—\u003c\/td\u003e\u003ctd\u003eTM2\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eElastic Modulus (28 days)\u003c\/td\u003e\u003ctd\u003e15-25 GPa\u003c\/td\u003e\u003ctd\u003e15-25 GPa\u003c\/td\u003e\u003ctd\u003eTM3\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBond Strength (7 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;2.0 MPa\u003c\/td\u003e\u003ctd\u003e\u0026ge;2.0 MPa\u003c\/td\u003e\u003ctd\u003eTM4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBond Strength (28 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;2.5 MPa\u003c\/td\u003e\u003ctd\u003e—\u003c\/td\u003e\u003ctd\u003eTM4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eShrinkage (1-28 days)\u003c\/td\u003e\u003ctd\u003eNo cracking\u003c\/td\u003e\u003ctd\u003eNo cracking\u003c\/td\u003e\u003ctd\u003eTM5\/TM6\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFlexural Strength (7 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;5.0 MPa\u003c\/td\u003e\u003ctd\u003e—\u003c\/td\u003e\u003ctd\u003eBS 6319:Part 3:1983\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFlexural Strength (28 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;6.0 MPa\u003c\/td\u003e\u003ctd\u003e—\u003c\/td\u003e\u003ctd\u003eBS 6319:Part 3:1983\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFigg Air Permeability (35 days)\u003c\/td\u003e\u003ctd\u003e\u0026gt;200 sec\u003c\/td\u003e\u003ctd\u003e\u0026ge;200 sec\u003c\/td\u003e\u003ctd\u003eTM6\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWater Absorption Data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eDuration\u003c\/th\u003e\u003cth\u003eAbsorption Rate\u003c\/th\u003e\u003cth\u003eTest Method\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003e28 days @ 10 min\u003c\/td\u003e\u003ctd\u003e\u0026lt;0.1 ml\/m\u0026sup2;\/s\u003c\/td\u003e\u003ctd\u003eBS 1881:Part 208\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e28 days @ 30 min\u003c\/td\u003e\u003ctd\u003e\u0026lt;0.08 ml\/m\u0026sup2;\/s\u003c\/td\u003e\u003ctd\u003eBS 1881:Part 208\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e28 days @ 60 min\u003c\/td\u003e\u003ctd\u003e\u0026lt;0.06 ml\/m\u0026sup2;\/s\u003c\/td\u003e\u003ctd\u003eBS 1881:Part 208\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e28 days @ 120 min\u003c\/td\u003e\u003ctd\u003e\u0026lt;0.05 ml\/m\u0026sup2;\/s\u003c\/td\u003e\u003ctd\u003eBS 1881:Part 208\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove all dust, loose material, and laitance from the concrete surface\u003c\/li\u003e\n\u003cli\u003eThoroughly wet concrete surfaces with clean water before application\u003c\/li\u003e\n\u003cli\u003eFor application thickness over 70 mm, apply Unicell Primer first\u003c\/li\u003e\n\u003cli\u003eEmpty entire bag into mixing vessel, add 3.5-4.5 litres of clean water, mix until a homogeneous workable mortar is achieved\u003c\/li\u003e\n\u003cli\u003eCompact the mortar firmly into the gap between frame and concrete to fill all voids\u003c\/li\u003e\n\u003cli\u003eFinish mortar surfaces with steel trowel 2-3 hours after application\u003c\/li\u003e\n\u003cli\u003eClean all tools with water immediately after use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between Unicell 40S and standard repair mortar?\u003c\/h3\u003e\n\u003cp\u003eUnicell 40S is specifically designed for window frame grouting and meets the HKHA Class 40 specification. Its waterproofing properties (very low water absorption) and shrinkage compensation make it particularly suitable for window frame applications, effectively preventing water ingress around frames. Standard repair mortars may not achieve the same waterproofing and impermeability standards.\u003c\/p\u003e\n\n\u003ch3\u003eCan Unicell 40S be used for general concrete repair?\u003c\/h3\u003e\n\u003cp\u003eUnicell 40S is primarily designed for window, door, and fire shutter frame grouting. For general concrete repair, use Unicell 40 (general Class 40 repair mortar) or Unicell 25 (Class 25 repair mortar) from the same range.\u003c\/p\u003e\n\n\u003ch3\u003eHow much water is needed per bag of Unicell 40S?\u003c\/h3\u003e\n\u003cp\u003eAdd 3.5 to 4.5 litres of clean water per 25 kg bag, mixing until a homogeneous workable mortar is achieved. Consumption is approximately 67 bags per cubic metre.\u003c\/p\u003e","brand":"Sika Ronacrete 西卡永聯結","offers":[{"title":"Default Title","offer_id":43686297305238,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/hk-02-en-HK-Unicell-40S-01-1x1-00948371.webp?v=1716652682","url":"https:\/\/wahhingwp.com\/en\/products\/%e8%a5%bf%e5%8d%a1%e6%b0%b8%e8%81%af%e7%b5%90-sika-ronacrete-unicell-40s-25kg","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}