{"product_id":"riw-cementseal","title":"RIW Cementseal","description":"\u003ch2 dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eRIW Cementseal 15kg Two-Part Cementitious Waterproofing Coating\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eRIW Cementseal 15kg\u003c\/strong\u003e is a two-component, polymer-modified, cement-based waterproof coating designed for concrete and masonry. It forms a seamless, fully bonded waterproof barrier and can be applied to damp surfaces, making it suitable for demanding below-ground and structural waterproofing applications. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eCementseal provides resistance to both \u003cstrong\u003epositive and negative water pressure\u003c\/strong\u003e, with the manufacturer's literature stating resistance to up to \u003cstrong\u003e100m head of water pressure\u003c\/strong\u003e. It can be applied by brush or spray and is suitable for basements, sub-structures, plant room floors and temporary waterproofing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/riwcementseal.jpg?v=1789475051\" alt=\"RIW Cementseal cementitious waterproofing\"\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-component polymer-modified cementitious waterproof coating\u003c\/li\u003e\n\u003cli\u003eTotally waterproof\u003c\/li\u003e\n\u003cli\u003eResists up to \u003cstrong\u003e100m head of positive and negative water pressure\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeamless and fully bonded\u003c\/li\u003e\n\u003cli\u003eCan be applied to damp surfaces\u003c\/li\u003e\n\u003cli\u003eResistant to abrasion and impact\u003c\/li\u003e\n\u003cli\u003eSuitable for brush or spray application\u003c\/li\u003e\n\u003cli\u003eEnhanced resistance to carbonation\u003c\/li\u003e\n\u003cli\u003eSuitable for below-ground waterproofing\u003c\/li\u003e\n\u003cli\u003eCan be used for temporary waterproofing\u003c\/li\u003e\n\u003cli\u003eSuitable for concrete, masonry and steel\u003c\/li\u003e\n\u003cli\u003eCE marked and assessed to \u003cstrong\u003eEN 1504-2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReaction to fire classification \u003cstrong\u003eEuroclass A2-s1, d0\u003c\/strong\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eApplications\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eRIW Cementseal is suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBasement waterproofing\u003c\/li\u003e\n\u003cli\u003eCellar waterproofing\u003c\/li\u003e\n\u003cli\u003eBelow-ground structures\u003c\/li\u003e\n\u003cli\u003eSub-structure waterproofing\u003c\/li\u003e\n\u003cli\u003eInternal tanking\u003c\/li\u003e\n\u003cli\u003eConcrete waterproofing\u003c\/li\u003e\n\u003cli\u003eMasonry waterproofing\u003c\/li\u003e\n\u003cli\u003ePlant room floor coatings\u003c\/li\u003e\n\u003cli\u003eTemporary waterproofing during construction\u003c\/li\u003e\n\u003cli\u003eWaterproofing areas exposed to water pressure\u003c\/li\u003e\n\u003cli\u003eProtection of concrete against water penetration and carbon dioxide diffusion \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eIt can be applied to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConcrete\u003c\/li\u003e\n\u003cli\u003eMasonry\u003c\/li\u003e\n\u003cli\u003eSteel \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eTechnical Information\u003c\/h3\u003e\n\u003cdiv dir=\"auto\" class=\"group TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable dir=\"auto\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eProperty\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eRIW Cementseal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e15kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eTwo-component polymer-modified cement-based coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003e1900kg\/m³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication temperature\u003c\/td\u003e\n\u003ctd\u003e5°C to 35°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking life\u003c\/td\u003e\n\u003ctd\u003e30 minutes at 20°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproofing resistance\u003c\/td\u003e\n\u003ctd\u003e10 bar pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvercoating time\u003c\/td\u003e\n\u003ctd\u003e30 minutes to 24 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication – soffits \u0026amp; vertical\u003c\/td\u003e\n\u003ctd\u003e2mm in 2 coats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication – floors\u003c\/td\u003e\n\u003ctd\u003e2mm in 1 coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemporary waterproofing\u003c\/td\u003e\n\u003ctd\u003e1mm in 1 coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYield per pack\u003c\/td\u003e\n\u003ctd\u003e7.9 litres of slurry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoverage\u003c\/td\u003e\n\u003ctd\u003eApproximately 4m² at 2mm thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShelf life\u003c\/td\u003e\n\u003ctd\u003e12 months at 20°C unopened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp dir=\"auto\"\u003eTechnical information is taken from the RIW Cementseal technical literature. The stated performance figures are typical values and should not be considered a product specification. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eSurface Preparation\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eSurfaces must be \u003cstrong\u003eclean, sound and free from loose or unsound material\u003c\/strong\u003e, including dust, oil, grease, corrosion by-products and organic growth. Smooth surfaces should be roughened.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe prepared substrate should be thoroughly soaked with clean water until uniformly saturated, but without standing water. Internal corners should be formed with \u003cstrong\u003eRIW Cementfill HB\u003c\/strong\u003e to create a continuous minimum \u003cstrong\u003e25 × 25mm fillet\u003c\/strong\u003e before Cementseal application. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eExisting finishes should be completely removed back to the structure. Pressure washing is recommended to help saturate the substrate and remove soil, dust and loose debris. Defective mortar joints should be repaired, while damaged masonry should be repaired using suitable RIW Cementfill products. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFor concrete substrates, the concrete sub-base should have a minimum strength of \u003cstrong\u003e20N\/mm²\u003c\/strong\u003e, with surface laitance removed before application. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eMixing\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eCementseal is supplied as a pre-measured two-part system. Shake the liquid component thoroughly and pour it into the supplied tub before slowly adding the powder.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eMix for a minimum of \u003cstrong\u003e5 minutes\u003c\/strong\u003e using a slow-speed drill and suitable paddle designed to minimise air entrainment. A normal concrete mixer is not suitable.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFor smaller applications, part packs can be mixed using an initial ratio of approximately \u003cstrong\u003e3.5 volumes of powder to 1 volume of liquid\u003c\/strong\u003e, adjusting as necessary to achieve the required consistency. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eApplication\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe mixed Cementseal slurry can be applied by \u003cstrong\u003ebrush, squeegee or spray\u003c\/strong\u003e to a pre-soaked surface. Care should be taken to avoid trapping air against the substrate. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFor horizontal surfaces, Cementseal can be applied as a single \u003cstrong\u003e1mm or 2mm layer\u003c\/strong\u003e, using a skid leveller or notched trowel, followed immediately by a spiked roller to release trapped air.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFor other surfaces, apply \u003cstrong\u003etwo 1mm coats\u003c\/strong\u003e. The second coat should be applied when the first is stable but not fully set, typically after approximately \u003cstrong\u003e30–60 minutes\u003c\/strong\u003e, depending on temperature. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eCuring should commence within \u003cstrong\u003e10–15 minutes\u003c\/strong\u003e of completing application. Protect the coating from strong sunlight and drying winds during curing. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eAncillary Products\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eRIW produces a range of products designed for use alongside Cementseal, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRIW Cementseal Primer\u003c\/strong\u003e – for horizontal and porous surfaces and also usable as a curing membrane\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRIW Cementfill FC\u003c\/strong\u003e – waterproof fairing coat and repair mortar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRIW Cementfill HB\u003c\/strong\u003e – waterproof high-build repair mortar for profiling and forming fillets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRIW Cementjoint\u003c\/strong\u003e – flexible waterproof composite tape for reinforcing joints \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eStorage \u0026amp; Shelf Life\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eStore Cementseal containers in \u003cstrong\u003edry, frost-free conditions\u003c\/strong\u003e. The stated shelf life is \u003cstrong\u003e12 months in unopened containers at 20°C\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eWhat is RIW Cementseal used for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eRIW Cementseal is a cement-based waterproof coating used for basements, cellars, sub-structures, plant room floors and temporary waterproofing applications. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eCan Cementseal be applied to damp concrete?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eYes. The manufacturer specifically states that Cementseal can be \u003cstrong\u003eapplied to damp surfaces\u003c\/strong\u003e, provided the substrate is properly prepared and saturated without standing water. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHow much area does a 15kg pack cover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne 15kg pack yields approximately \u003cstrong\u003e7.9 litres of slurry\u003c\/strong\u003e and is sufficient to treat approximately \u003cstrong\u003e4m² at 2mm thickness\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHow thick should Cementseal be applied?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFor soffits and vertical surfaces, apply \u003cstrong\u003e2mm in two coats\u003c\/strong\u003e. For floors, the specification allows \u003cstrong\u003e2mm in one coat\u003c\/strong\u003e. Temporary waterproofing can be applied at \u003cstrong\u003e1mm in one coat\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHow long should I wait before applying the second coat?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe second coat should generally be applied after approximately \u003cstrong\u003e30–60 minutes\u003c\/strong\u003e, when the first coat is stable but not fully set. The actual timing depends on temperature.\u003c\/p\u003e\n\u003cp\u003eDownloads\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/3p6hAsDKrftPA3eIvxFax7nlKyEN04Z418e9y6Nl.pdf?v=1789475218\" title=\"RIW Cementseal Data Sheet\"\u003eData Sheet\u003c\/a\u003e\u003c\/p\u003e","brand":"RIW","offers":[{"title":"15kg","offer_id":57456981508471,"sku":"RIWCEMENTSEAL15","price":111.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/riwcementseal.jpg?v=1789475051","url":"https:\/\/clevershieldcoatings.co.uk\/products\/riw-cementseal","provider":"Clever Shield - Asset Protection","version":"1.0","type":"link"}