{"title":"Potable Water Tank Waterproofing","description":"\u003ch2\u003ePotable Water Tank Waterproofing\u003c\/h2\u003e\u003cp\u003eWaterproofing materials specifically certified for contact with drinking water. These coatings and mortars are formulated to prevent leakage while being completely safe and non-toxic for potable water storage applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eDrinking water certified\u003c\/strong\u003e - WRAS, NSF or equivalent certification for potable water contact\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eWaterproof barrier\u003c\/strong\u003e - Prevents water ingress and egress\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eNon-toxic\u003c\/strong\u003e - No harmful substances leach into stored water\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDurable\u003c\/strong\u003e - Long-lasting protection against water pressure\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eDrinking water tanks and cisterns\u003c\/li\u003e\u003cli\u003eWater reservoirs and storage facilities\u003c\/li\u003e\u003cli\u003eWater treatment plant structures\u003c\/li\u003e\u003cli\u003eElevated water towers\u003c\/li\u003e\u003cli\u003eSwimming pool water features (potable-grade)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eAvailable Brands\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eSika\u003c\/strong\u003e - SikaTop Seal-107 (potable water grade), Sika-1\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eFosroc\u003c\/strong\u003e - Renderoc series (potable water approved)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat certifications should I look for?\u003c\/h3\u003e\u003cp\u003eLook for WRAS (UK), NSF\/ANSI 61 (US) or equivalent local certification confirming the product is safe for contact with drinking water. All our potable water products carry appropriate certifications.\u003c\/p\u003e\u003ch3\u003eHow long does the waterproofing last?\u003c\/h3\u003e\u003cp\u003eProperly applied cementitious waterproofing in water tanks can last 15-20+ years. Regular inspection is recommended to ensure continued performance.\u003c\/p\u003e","products":[{"product_id":"fosroc-nitocote-cm210","title":"Fosroc Nitocote CM210","description":"\u003cdiv class=\"tldr-box\" style=\"background:#f0f4f8;border-left:4px solid #2c5282;padding:16px;margin-bottom:24px\"\u003e\u003cstrong\u003eTL;DR:\u003c\/strong\u003e\u003cp\u003eNitocote CM210 is a two-component elastomeric cementitious waterproof coating by Fosroc. Approved by the UK Drinking Water Inspectorate (DWI) (per manufacturer), it withstands high positive and negative water pressure and maintains excellent crack-bridging performance even after prolonged immersion.\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eNitocote CM210 is a two-component polymer-modified elastomeric cementitious coating supplied in pre-packaged form. It is mixed on-site with a slow-speed drill and paddle, then applied to form an elastomeric impermeable membrane. Available in grey and white, the product is designed for waterproofing water-retaining and water-excluding structures such as potable water tanks, reservoirs, canals, and culverts. It can be applied to concrete, brick, and blockwork substrates and maintains excellent crack accommodation even after long-term water immersion — a condition many cementitious coatings cannot satisfy.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003ePotable water approved\u003c\/strong\u003e — Approved by the UK Drinking Water Inspectorate (DWI) (per manufacturer)\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eHigh water pressure resistance\u003c\/strong\u003e — Withstands high positive and negative hydrostatic pressures\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCrack bridging after immersion\u003c\/strong\u003e — Maintains excellent crack accommodation after prolonged water immersion\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eStrong adhesion\u003c\/strong\u003e — Excellent bond to concrete and masonry substrates\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDamp surface application\u003c\/strong\u003e — Can be applied directly to green or damp concrete\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eChemical barrier\u003c\/strong\u003e — Effective barrier to sulphates and chlorides\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eVersatile application\u003c\/strong\u003e — Suitable for brush, roller, trowel, or spray application\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAmple working time\u003c\/strong\u003e — Sufficient working life after mixing\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003ePotable water tanks (rooftop and underground)\u003c\/li\u003e\u003cli\u003eReservoirs and water storage facilities\u003c\/li\u003e\u003cli\u003eCanals and culverts\u003c\/li\u003e\u003cli\u003eBasements and underground structures (resists negative water pressure)\u003c\/li\u003e\u003cli\u003eConcrete, brick, and blockwork structures\u003c\/li\u003e\u003cli\u003eWater-retaining structures requiring long-term immersion resistance\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003ePackaging\u003c\/h2\u003e\u003cp\u003e23KG per set (18kg powder component + 5kg liquid polymer). Available in grey and white.\u003c\/p\u003e\u003ch2\u003eImportant Notes\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eNot suitable for application in low-temperature conditions\u003c\/li\u003e\u003cli\u003eProtect from rainfall and running water during application and initial curing\u003c\/li\u003e\u003cli\u003eNot recommended for external surfaces where aesthetic appearance is critical, as curing conditions may cause colour variations\u003c\/li\u003e\u003cli\u003eLiquid component must not be frozen during storage\u003c\/li\u003e\u003cli\u003eShelf life is six months in unopened packs\u003c\/li\u003e\u003cli\u003eStrict adherence to mixing instructions is essential — inadequate mixing may compromise performance\u003c\/li\u003e\u003cli\u003eFor detailed application methods, coverage rates, and technical parameters, please refer to the official product data sheet\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eHow do I choose between CM210 and Brushbond for potable water tanks?\u003c\/h3\u003e\u003cp\u003eBoth are approved for potable water contact (per manufacturer). CM210 resists both positive and negative water pressure with higher elasticity, making it ideal for underground tanks subject to external water pressure. Brushbond offers better breathability, making it more suitable for rooftop water tanks where moisture vapour permeability is needed.\u003c\/p\u003e\u003ch3\u003eCan CM210 be used for basement waterproofing?\u003c\/h3\u003e\u003cp\u003eYes, it is well suited for this application. CM210 resists negative water pressure (groundwater pushing from outside through the structure), making it an ideal choice for basement and underground waterproofing. It can be applied directly to damp concrete surfaces without waiting for the substrate to dry completely.\u003c\/p\u003e","brand":"Fosroc 富斯樂","offers":[{"title":"Default Title","offer_id":42397801971862,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/Nitocote_CM210.png?v=1776659385"},{"product_id":"spec-cw100","title":"SPEC CW100","description":"\u003cp\u003eSpECtite CW100 is a two-component polymer-modified cementitious coating. The product can be applied using a trowel, brush, or spray to provide a flexible, waterproof barrier. SpECtite CW100 meets the requirements of BS 6920 and is suitable for use in contact with potable water.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWithstands hydrostatic pressures\u003c\/li\u003e\n\u003cli\u003eGood bond strength to concrete and masonry\u003c\/li\u003e\n\u003cli\u003eGood crack bridging capabilities even after long periods of immersion\u003c\/li\u003e\n\u003cli\u003eLong pot life even at high temperatures\u003c\/li\u003e\n\u003cli\u003eResists diesel, petrol, calcium chloride, and mild inorganic acids\u003c\/li\u003e\n\u003cli\u003eExcellent weather resistance and can accept normal foot traffic\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Uses\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePotable water containers, tanks, and reservoirs\u003c\/li\u003e\n\u003cli\u003eSwimming pools and silos\u003c\/li\u003e\n\u003cli\u003eWaterproofing planter boxes\u003c\/li\u003e\n\u003cli\u003eWaterproofing new and existing buildings\u003c\/li\u003e\n\u003cli\u003eAs a backing to marble and granite to prevent water ingress and alleviate surface staining\u003c\/li\u003e\n\u003cli\u003eProtection against brackish water\u003c\/li\u003e\n\u003cli\u003eCoating seawater channels\u003c\/li\u003e\n\u003cli\u003eWet areas, toilets, balconies, and loggias\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"SPEC","offers":[{"title":"Default Title","offer_id":43686347210902,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/SPECCW100_e7b971e6-8010-4a50-beb3-c61ae37c2f13.png?v=1754554311"},{"product_id":"sika-西卡-sika-combiflex-sg-w-飲用水水箱接縫防水膠帶","title":"Sika Combiflex SG (W)","description":"\u003ch2\u003eSika Combiflex SG (W) — Drinking Water-Safe Waterproofing Joint Tape\u003c\/h2\u003e\n\u003cp\u003eSika Combiflex SG (W) is a flexible waterproofing joint tape approved for use in drinking water tanks and reservoirs. It seals construction joints and cracks in concrete water-retaining structures.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApproved for drinking water contact\u003c\/li\u003e\n\u003cli\u003eExcellent waterproofing at joints\u003c\/li\u003e\n\u003cli\u003eFlexible and durable\u003c\/li\u003e\n\u003cli\u003eChemical resistant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDrinking water tank joint sealing\u003c\/li\u003e\n\u003cli\u003eReservoir joint waterproofing\u003c\/li\u003e\n\u003cli\u003eWater-retaining structure joints\u003c\/li\u003e\n\u003cli\u003ePotable water infrastructure sealing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sika 西卡","offers":[{"title":"Default Title","offer_id":46352837443734,"sku":null,"price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/Sika_NoClaim_pos_rgb_30_d03261f8-a56d-4619-9477-89441e859c9d.png?v=1776681946"},{"product_id":"富斯樂-nitocote-ep405-水箱塗料","title":"Fosroc Nitocote EP405","description":"\u003ch2\u003eFosroc Nitocote EP405 — Potable Water Tank Epoxy Coating\u003c\/h2\u003e\n\u003cp\u003eNitocote EP405 is a two-component, solvent-free epoxy coating certified for contact with potable (drinking) water. It protects the interior of concrete and steel water tanks, reservoirs, and water treatment facilities.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCertified safe for potable water contact\u003c\/li\u003e\n\u003cli\u003eSolvent-free epoxy — no taint or odour\u003c\/li\u003e\n\u003cli\u003eExcellent water and chemical resistance\u003c\/li\u003e\n\u003cli\u003eProtects concrete from water ingress and steel from corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePotable water tanks and reservoirs\u003c\/li\u003e\n\u003cli\u003eWater treatment plant structures\u003c\/li\u003e\n\u003cli\u003eSwimming pool lining\u003c\/li\u003e\n\u003cli\u003eFood-grade storage facility coating\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fosroc 富斯樂","offers":[{"title":"Default Title","offer_id":46352837902486,"sku":null,"price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/1_c3e1fa31-7fa8-4ca3-9484-bd3141b653a6.png?v=1776681972"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/collections\/026d875c6f0bb256bfd42154ee5fdbae.png?v=1776663953","url":"https:\/\/wahhingwp.com\/en\/collections\/%e9%a3%b2%e7%94%a8%e6%b0%b4-%e6%b0%b4%e7%bc%b8-%e6%b0%b4%e5%ba%ab%e9%98%b2%e6%b0%b4.oembed","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}