{"product_id":"sikalastic-moisture-seal-20l","title":"Sikalastic Moisture Seal 20L – Epoxy Primer \u0026 Waterproofing Barrier","description":"\u003ch2\u003eSikalastic Moisture Seal 20L – Two Part Epoxy Waterproofing Primer\u003c\/h2\u003e\n\u003cp\u003eStop moisture in its tracks before it compromises your floor coating. \u003cstrong\u003eSikalastic Moisture Seal\u003c\/strong\u003e is a high-performance, two-component water-based epoxy that chemically cures to form a robust vapour barrier — resistant to hydrostatic pressure and capable of preventing rising damp. Whether you're priming damp concrete in a basement, waterproofing a green screed, or preparing a surface for a liquid-applied membrane, this is the product that gets the job done right the first time.\u003c\/p\u003e\n\u003cp\u003eAvailable exclusively at \u003cstrong\u003eEpoxy Warehouse\u003c\/strong\u003e — Australia's trusted supplier of professional-grade floor coating systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eExcellent adhesion to damp substrates\u003c\/strong\u003e — apply directly over damp or green concrete and screeds\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eDual-function: primer + moisture barrier\u003c\/strong\u003e — eliminates the need for two separate products\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eHydrostatic pressure resistant\u003c\/strong\u003e — ideal for below-grade and negative pressure applications\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eLow VOC formula\u003c\/strong\u003e — safe for use in confined and poorly ventilated spaces\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eNon-flammable\u003c\/strong\u003e — reduced site risk during application\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eSimple 1:1 mix ratio\u003c\/strong\u003e — no guesswork, less waste\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eWater clean-up\u003c\/strong\u003e — easy tool and equipment maintenance on site\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eRecommended Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWaterproofing and priming of damp or green concrete slabs\u003c\/li\u003e\n\u003cli\u003eWaterproofing and priming of damp or green cement screeds\u003c\/li\u003e\n\u003cli\u003eRendered brickwork, rendered blockwork, and fibrous cement sheeting\u003c\/li\u003e\n\u003cli\u003eNegative pressure waterproofing applications\u003c\/li\u003e\n\u003cli\u003eMoisture vapour barrier coating for green screeds prior to floor coating installation\u003c\/li\u003e\n\u003cli\u003ePrimer coat prior to application of liquid-applied waterproofing membranes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMix Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1:1 by volume (Part A : Part B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage – Moisture Barrier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMinimum 2 coats at 3 m² per litre per coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage – Primer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 coat at 10 m² per litre per coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePot Life @ 25°C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePot Life @ 35°C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOvercoating Window\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMinimum 6 hours, maximum 48 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull Cure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10°C – 35°C (substrate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 Litres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eApplication Instructions\u003c\/h3\u003e\n\u003ch4\u003eSurface Preparation\u003c\/h4\u003e\n\u003cp\u003eAll surfaces must be firm, clean, structurally sound, and free from grease, oil, wax, curing compounds, dust, laitance, and loose material. Remove all projections and rough spots to achieve a level, continuous surface. Previously coated or treated substrates must be mechanically prepared to expose a clean, contaminant-free surface.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete:\u003c\/strong\u003e Allow a minimum of 72 hours cure time before application. Repair surface imperfections with a suitable Sika® MonoTop repair mortar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCement render \/ sand screeds:\u003c\/strong\u003e Allow a minimum of 24 hours cure time before application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheeting:\u003c\/strong\u003e Fix in accordance with the manufacturer's installation directions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMixing\u003c\/h4\u003e\n\u003cp\u003eThoroughly stir Part A and Part B separately before combining. Measure equal volumes of each part and pour into a clean container. Using a mechanical mixer, blend until a homogeneous liquid is achieved — take care to avoid air entrapment. Do not mix more product than can be used within 90 minutes at 25°C.\u003c\/p\u003e\n\u003ch4\u003eApplication\u003c\/h4\u003e\n\u003cp\u003eApply by brush, roller, or airless spray. For moisture barrier applications, apply a minimum of 2 coats at 3 m²\/L per coat. For use as a primer, apply 1 coat at 10 m²\/L. Allow a minimum of 6 hours and a maximum of 48 hours between coats and prior to overcoating with a waterproofing membrane. If the 48-hour window is exceeded, apply an additional coat of Sikalastic® Moisture Seal to reactivate the surface and extend the overcoating interval.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eLimitations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDo not apply over existing protective coatings\u003c\/li\u003e\n\u003cli\u003eDo not apply in rain or if rain is imminent\u003c\/li\u003e\n\u003cli\u003eNot recommended for metal surfaces (risk of corrosion)\u003c\/li\u003e\n\u003cli\u003eMust cure for a minimum of 72 hours before full immersion or water testing\u003c\/li\u003e\n\u003cli\u003eNot suitable as a trafficable, UV-stable, or exposed coating\u003c\/li\u003e\n\u003cli\u003eNot recommended as an efflorescence barrier for sand cement screeds or render\u003c\/li\u003e\n\u003cli\u003eNot suitable to be tiled over\u003c\/li\u003e\n\u003cli\u003eDo not apply below 10°C or above 35°C substrate temperature\u003c\/li\u003e\n\u003cli\u003eDiscard any material that has exceeded pot life\u003c\/li\u003e\n\u003cli\u003eEnsure adequate ventilation in enclosed areas during application and cure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003ePair It With the Right Waterproofing System\u003c\/h3\u003e\n\u003cp\u003eSikalastic Moisture Seal is designed to be used as part of a complete Sika waterproofing system. Once your primer coat has cured, top it with one of these compatible membranes available at Epoxy Warehouse:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sikalastic-487-15ltr-grey\"\u003eSikalastic 487 Elastomeric PU Waterproofing Membrane – 15L Grey\u003c\/a\u003e — flexible polyurethane membrane for demanding waterproofing applications\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eDownload Datasheets\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ctable width=\"100%\" style=\"height: 19.5938px; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0694\/4836\/8214\/files\/sikalastic-moisture_seal_product_data_sheet.pdf?v=1776744875\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0694\/4836\/8214\/files\/DIS-Document-Icons-2.png?v=1766645747\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px; width: 50%;\"\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0694\/4836\/8214\/files\/sds-sikalastic-moistureseal_parta.pdf?v=1776744875\" target=\"_blank\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0694\/4836\/8214\/files\/EPW-Document-Icons-3.png?v=1766645828\" alt=\"\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan Sikalastic Moisture Seal be applied to wet or damp concrete?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes — this is one of its standout features. Sikalastic® Moisture Seal is specifically formulated for application over damp and green concrete and screeds, making it ideal for situations where full drying is not possible before waterproofing or coating work must proceed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many coats do I need for a moisture barrier?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA minimum of 2 coats is required when using Sikalastic® Moisture Seal as a moisture vapour barrier, applied at a rate of 3 m² per litre per coat. When used solely as a primer prior to a waterproofing membrane, 1 coat at 10 m²\/L is sufficient.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long do I need to wait between coats?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAllow a minimum of 6 hours and a maximum of 48 hours between coats. If the 48-hour window is exceeded, apply an additional coat of Sikalastic® Moisture Seal to reactivate the surface before proceeding.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Sikalastic® Moisture Seal safe to use indoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It is a low VOC, water-based, non-flammable product — making it well-suited for use in confined spaces and indoor environments. Ensure adequate ventilation is provided during application and curing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I tile over Sikalastic® Moisture Seal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Sikalastic® Moisture Seal is not suitable to be tiled over. It is designed as a primer and vapour barrier to be used in conjunction with compatible Sika® liquid-applied waterproofing membranes. Contact Sika Technical to confirm membrane compatibility before use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the pot life of Sikalastic® Moisture Seal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt 25°C, the pot life is 90 minutes. At 35°C, this reduces to 45 minutes. Only mix as much product as you can apply within the pot life window — discard any material that has exceeded working time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Sikalastic® Moisture Seal suitable for negative pressure waterproofing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It is specifically listed for negative pressure waterproofing applications, making it suitable for below-grade walls and structures where water pressure acts from the outside in.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere can I buy Sikalastic® Moisture Seal in Australia?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSikalastic® Moisture Seal 20L is available online at \u003cstrong\u003eEpoxy Warehouse\u003c\/strong\u003e with Australia-wide shipping. Add to cart above or contact our team for bulk pricing and trade enquiries.\u003c\/p\u003e","brand":"Sika","offers":[{"title":"Default Title","offer_id":44521597861974,"sku":"SL-MS-20L","price":390.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/4836\/8214\/files\/sikalastic_moisture_seal_20L.png?v=1776744877","url":"https:\/\/epoxywarehouse.com.au\/products\/sikalastic-moisture-seal-20l","provider":"Epoxy Warehouse | Epoxy Floor Coating Supplier","version":"1.0","type":"link"}