{"product_id":"sovereign-heydi-k11-tanking-compound","title":"Sovereign Hey'Di K11 Tanking Compound","description":"\u003ch3\u003eSalt-Resistant Cementitious Waterproofing Slurry for Positive \u0026amp; Negative Pressure Applications\u003c\/h3\u003e\n\u003cp\u003eSovereign Hey'Di K11 is a high-performance, cementitious tanking compound designed to protect structures against water ingress and hydrostatic pressure. Suitable for both internal (negative side) and external (positive side) applications, K11 forms a durable, waterproof barrier on concrete, brick, and masonry substrates without the need for additional support structures.\u003c\/p\u003e\n\u003ch4\u003eKey Features \u0026amp; Benefits\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Side Application:\u003c\/strong\u003e Effective on both positive and negative pressure sides of structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Water Resistance:\u003c\/strong\u003e Withstands over 10 bars of hydrostatic pressure with a 4mm coating in two layers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalt Resistance:\u003c\/strong\u003e Prevents the movement of hygroscopic salts; ideal for salt-contaminated walls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotable Water Safe:\u003c\/strong\u003e Certified for use in contact with drinking water, suitable for water-retaining structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBBA Certified:\u003c\/strong\u003e Covered by British Board of Agrément Certificate 91\/2608.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Specifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Dry powder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColours:\u003c\/strong\u003e Grey (mandatory first coat), White (optional second coat)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Size:\u003c\/strong\u003e 25 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eBelow Ground: approx. 4 kg\/m² (two coats)\u003c\/li\u003e\n\u003cli\u003eAbove Ground: approx. 2 kg\/m² (one coat)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf Life:\u003c\/strong\u003e 12 months unopened in dry conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eApplication Guidelines\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eEnsure substrates are clean, sound, and pre-wetted with clean water.\u003c\/li\u003e\n\u003cli\u003eMix powder with Sovereign SBR Bonding Agent diluted 2:1 with water to create a smooth slurry.\u003c\/li\u003e\n\u003cli\u003eApply the first coat (Grey) at a minimum of 2mm using a block brush.\u003c\/li\u003e\n\u003cli\u003eAfter approx. 4 hours, apply the second coat (Grey or White) at similar thickness.\u003c\/li\u003e\n\u003cli\u003eProtect the coating from drying too quickly and allow to cure for at least 24 hours before additional finishes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch4\u003eApplication Notes \u0026amp; Best Practices\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Tools:\u003c\/strong\u003e\n\u003ch5 style=\"margin-top: 0.5em;\"\u003eWhat You'll Need\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Brush or Masonry Brush:\u003c\/strong\u003e For even, heavy-duty application of slurry across concrete and masonry surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaddle Mixer (Drill Attachment):\u003c\/strong\u003e Ensures a smooth, lump-free slurry mix for consistent performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing Bucket (Clean Plastic):\u003c\/strong\u003e Use a minimum 20 L bucket to avoid spillage and ensure full mix activation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtective Gear:\u003c\/strong\u003e Gloves, goggles, dust mask, and coveralls to prevent skin and eye contact with alkaline cement-based material.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Conditions:\u003c\/strong\u003e Apply only when ambient and substrate temperatures are between +5 °C and +30 °C. Protect from frost, direct sunlight, and strong wind during and after application. Do not apply to frozen or excessively hot surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCuring Times:\u003c\/strong\u003e Allow at least 24–48 hours before exposing treated surfaces to light foot traffic. Wait 3–5 days before applying render, plaster, or tile adhesives. Full curing typically occurs after 7 days under standard site conditions (20 °C, 65% RH).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftercare:\u003c\/strong\u003e Protect newly applied coatings from mechanical damage and excessive drying. If rapid drying is likely, lightly mist with clean water or cover with damp hessian for 24 hours.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTypical Applications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBasements and cellars – waterproofing walls and floors\u003c\/li\u003e\n\u003cli\u003eWater-retaining structures – fishponds, tanks, bunds\u003c\/li\u003e\n\u003cli\u003eSalt-contaminated walls – chimney breasts, barns\u003c\/li\u003e\n\u003cli\u003eSwimming pools – pre-tile waterproofing\u003c\/li\u003e\n\u003cli\u003eLift pits and inspection chambers – below-ground waterproofing\u003c\/li\u003e\n\u003cli\u003eAlternative damp proof course – where physical DPC is impractical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAncillary Products\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSovereign Hey'Di Barrier Mortar:\u003c\/strong\u003e For watertight fillets at wall\/floor junctions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSovereign Hey'Di Powder X:\u003c\/strong\u003e For halting active water leaks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSovereign SBR Bonding Agent:\u003c\/strong\u003e Improves adhesion and elasticity of K11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSovereign Renderlite Renovating Plaster:\u003c\/strong\u003e Breathable finish post-tanking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUsage \u0026amp; Safety\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eContains cement—may cause skin irritation, serious eye damage, or respiratory irritation.\u003c\/li\u003e\n\u003cli\u003eAlways wear gloves, goggles, and dust protection when mixing or applying.\u003c\/li\u003e\n\u003cli\u003eEnsure good ventilation during use.\u003c\/li\u003e\n\u003cli\u003eIn case of contact with eyes or skin, rinse immediately with clean water and seek medical advice if needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor comprehensive safety and handling guidelines, download the safety data sheet.\u003c\/p\u003e\n\u003ch4\u003eComparison Table\u003c\/h4\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eHey'Di K11\u003c\/th\u003e\n\u003cth\u003eStandard Mortar\u003c\/th\u003e\n\u003cth\u003eBituminous Coating\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproofing Capability\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalt Resistance\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotable Water Safe\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePositive \u0026amp; Negative Side Usage\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003ePartial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBBA Certified\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003ePartial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"DIY Refurb","offers":[{"title":"Default Title","offer_id":53341498212690,"sku":"30607678","price":86.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1060\/4006\/6386\/files\/Heydi-K11-Tanking-Pic-1.webp?v=1777965904","url":"https:\/\/glazingsuppliesdirect.com\/products\/sovereign-heydi-k11-tanking-compound","provider":"Glazing Supplies Direct","version":"1.0","type":"link"}