{"product_id":"bostik-cementone-water-seal-5-litre-30812236","title":"Bostik Cementone Water Seal 5 Litre | 30812236","description":"\u003cul\u003e\n\u003cli\u003eSingle-coat exterior water seal for masonry and wood\u003c\/li\u003e\n\u003cli\u003eClear, breathable finish - does not trap moisture\u003c\/li\u003e\n\u003cli\u003eCovers 2-4 m² per litre depending on substrate\u003c\/li\u003e\n\u003cli\u003eDries in 3-4 hours; fully active after 24 hours\u003c\/li\u003e\n\u003cli\u003eResists rain, damp, frost, UV, mould, and algae\u003c\/li\u003e\n\u003cli\u003eSuitable for brick, stone, render, slate, timber, terracotta\u003c\/li\u003e\n\u003cli\u003eSolvent-based formula; apply at +5°C to +25°C\u003c\/li\u003e\n\u003cli\u003e5-litre container; 18-month shelf life unopened\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n\u003ca href=\"\/collections\/bostik\" style=\"color: #2b00ff;\"\u003eBostik\u003c\/a\u003e Cementone Water Seal for Exterior Masonry and Wood\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSingle-Coat Protection Against Damp and Frost:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBostik Cementone Water Seal is a solvent-based exterior water seal formulated to protect porous masonry, brickwork, stone, timber, and terracotta in a single coat. It penetrates the surface to create an invisible, water-repellent barrier that resists rain, damp, and frost damage without altering the appearance of the treated substrate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBreathable Formula That Lets Surfaces Dry Out:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike film-forming sealers, this water seal remains permeable to water vapour, so moisture already present in the structure can escape rather than becoming trapped. This breathable action helps reduce mould and algae growth, limits dirt retention, and contributes to improved insulation values in treated walls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoverage, Drying, and Application:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCoverage is 2 to 4 m² per litre per coat, depending on substrate porosity and application method. The product dries in approximately 3 to 4 hours at temperatures between +5°C and +25°C, with full water-repellent properties developing after 24 hours. Always carry out a test on a small area first, as some surfaces may darken very slightly on application.\u003c\/p\u003e\n\u003cp\u003eShop our full \u003ca href=\"\/collections\/painting-decorating\" style=\"color: #2b00ff;\"\u003ePainting \u0026amp; Decorating range\u003c\/a\u003e at Heavins.ie for sealers, primers, and exterior treatments delivered across Ireland.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSingle coat\u003c\/strong\u003e - one application provides trade-grade water repellency.\u003cbr\u003e\u003cstrong\u003eBreathable barrier\u003c\/strong\u003e - water vapour escapes, so moisture is not trapped in the structure.\u003cbr\u003e\u003cstrong\u003eClear finish\u003c\/strong\u003e - transparent; does not alter the appearance of the treated surface.\u003cbr\u003e\u003cstrong\u003eWide substrate compatibility\u003c\/strong\u003e - suitable for brickwork, cement render, cast concrete, roughcast, stonework, limestone, slate, terracotta, wood, and leather.\u003cbr\u003e\u003cstrong\u003eUV and frost resistant\u003c\/strong\u003e - high resistance to UV light, frost, and general weathering.\u003cbr\u003e\u003cstrong\u003eReduces maintenance\u003c\/strong\u003e - limits mould, algae, staining, and efflorescence on treated surfaces.\u003cbr\u003e\u003cstrong\u003eFast drying\u003c\/strong\u003e - surface dry in 3 to 4 hours; fully active after 24 hours.\u003cbr\u003e\u003cstrong\u003eExterior use only\u003c\/strong\u003e - formulated for above-ground, exposed masonry and timber surfaces.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Bostik (Cementone sub-brand)\u003c\/li\u003e\n\u003cli\u003eProduct Code: 30812236\u003c\/li\u003e\n\u003cli\u003eEAN: 5011734010932\u003c\/li\u003e\n\u003cli\u003eVolume: 5 litres\u003c\/li\u003e\n\u003cli\u003eFinish: Clear \/ transparent\u003c\/li\u003e\n\u003cli\u003eComposition: Polyoxo aluminium stearate based, solvent-borne\u003c\/li\u003e\n\u003cli\u003eSpecific Gravity: Approximately 0.8\u003c\/li\u003e\n\u003cli\u003eCoverage: 2-4 m² per litre per coat (substrate dependent)\u003c\/li\u003e\n\u003cli\u003eNumber of Coats: 1\u003c\/li\u003e\n\u003cli\u003eDrying Time: 3-4 hours approximately\u003c\/li\u003e\n\u003cli\u003eFull Performance: After 24 hours\u003c\/li\u003e\n\u003cli\u003eApplication Temperature: +5°C to +25°C\u003c\/li\u003e\n\u003cli\u003eUse: Exterior only\u003c\/li\u003e\n\u003cli\u003eCompatible Substrates: Brickwork, cement render, cast concrete, roughcast, stonework, limestone, slate, terracotta, wood, leather\u003c\/li\u003e\n\u003cli\u003eShelf Life: Up to 18 months from date of manufacture (unopened)\u003c\/li\u003e\n\u003cli\u003eStorage: Cool, dry conditions, +5°C to +25°C, out of direct sunlight; protect from frost\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bostik","offers":[{"title":"Default Title","offer_id":57561149473141,"sku":"5011734010932","price":44.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0614\/5261\/5816\/files\/30812236_Cementone_Water_Seal_5_Litres_1.webp?v=1789377693","url":"https:\/\/www.heavins.ie\/products\/bostik-cementone-water-seal-5-litre-30812236","provider":"Heavins","version":"1.0","type":"link"}