{"product_id":"sika-西卡-sikalastic-591-聚氨酯pu抗紫外線彈性防水膜","title":"Sika Sikalastic 591","description":"\u003cdiv class=\"tldr-box\" style=\"background: #f0f4f8; border-left: 4px solid #2c5282; padding: 16px; margin-bottom: 24px;\"\u003e\n\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cp\u003eSikalastic®-590 is a one-component waterborne liquid applied roof waterproofing membrane based on polyurethane modified acrylic dispersion, with improved ponding water capability. Ready to use with no flame required. Features high elasticity (~360% elongation), excellent UV resistance and anti-yellowing performance, and passed 1,000-hour artificial weathering testing. The white version achieves ~80% solar reflectance and SRI ~101. Suitable for roof waterproofing in new construction and refurbishment, particularly for roofs where short-term ponding may occur.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSikalastic-590 — Liquid Roof Waterproofing with Improved Ponding Water Capability\u003c\/h2\u003e\n\u003cp\u003eSikalastic®-590 is a one-component polyurethane-acrylic dispersion waterborne liquid waterproofing membrane with improved water ponding resistance. It is ready to use and can be applied manually or by spray, either as a coating or as a reinforced liquid applied membrane system. It features excellent UV resistance, anti-yellowing performance and good crack-bridging capacity, forming a seamless elastic waterproofing membrane.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGood behavior under limited water ponding (improved formulation)\u003c\/li\u003e\n\u003cli\u003eUV resistant and resistant to yellowing and weathering\u003c\/li\u003e\n\u003cli\u003eHighly elastic and crack-bridging (~360% elongation at break)\u003c\/li\u003e\n\u003cli\u003eNon-toxic and VOC compliant water-based coating\u003c\/li\u003e\n\u003cli\u003eOne component — ready to use\u003c\/li\u003e\n\u003cli\u003eExcellent adhesion on porous and non-porous substrates\u003c\/li\u003e\n\u003cli\u003eSeamless waterproofing membrane — no joints or laps\u003c\/li\u003e\n\u003cli\u003eWater vapour permeable — allows the substrate to breathe\u003c\/li\u003e\n\u003cli\u003ePassed 1,000-hour artificial weathering test (ASTM G154, UVA-340) — no cracking, blistering, delamination or chalking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eRoof waterproofing\u003c\/strong\u003e — liquid applied waterproofing for new construction and refurbishment projects\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eComplex roofs\u003c\/strong\u003e — roofs with many details, complex geometry or limited accessibility\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRoof life extension\u003c\/strong\u003e — cost efficient life cycle extension of failing roofs\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eReflective coating\u003c\/strong\u003e — white version enhances energy efficiency by reducing cooling costs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose Sikalastic-590?\u003c\/h2\u003e\n\u003cp\u003eSikalastic-590 is a liquid roof waterproofing membrane in the Sika range with improved ponding water capability, suitable for roofs where drainage conditions may not be ideal:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eImproved ponding water capability:\u003c\/strong\u003e Better resistance to short-term ponding water compared to standard liquid membranes, suitable for roofs with minor water accumulation\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUV and anti-yellowing:\u003c\/strong\u003e Excellent weathering resistance, passed 1,000-hour accelerated weathering test, white version resists yellowing\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHigh elasticity:\u003c\/strong\u003e ~360% elongation at break — effectively bridges substrate cracks\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEnergy efficiency:\u003c\/strong\u003e White version achieves ~80% solar reflectance and SRI ~101, reducing roof surface temperature and cooling costs\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSika brand:\u003c\/strong\u003e Swiss Sika — over 100 years of proven quality and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor other roof waterproofing solutions, browse our \u003ca href=\"\/en\/collections\/%E5%A4%A9%E5%8F%B0%E9%98%B2%E6%B0%B4\"\u003eroof waterproofing range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003ePackaging\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003e20 kg plastic pails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColours\u003c\/td\u003e\n\u003ctd\u003eGrey and white\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShelf Life\u003c\/td\u003e\n\u003ctd\u003e12 months from date of production (store properly in original, unopened, undamaged sealed packaging in dry conditions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical Base\u003c\/td\u003e\n\u003ctd\u003ePolyurethane modified acrylic dispersion (waterborne)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003e~1.32 kg\/l at +30°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength (free film, \u003e 7 days)\u003c\/td\u003e\n\u003ctd\u003e~1.7 N\/mm² (ASTM D412)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break (free film)\u003c\/td\u003e\n\u003ctd\u003e~360% (ASTM D412)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdhesion in Peel (free film, \u003e 7 days)\u003c\/td\u003e\n\u003ctd\u003e~1.5 N\/mm² (ASTM D7234)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Reflectance (white)\u003c\/td\u003e\n\u003ctd\u003e~80% (ASTM E903-12)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Emittance (white)\u003c\/td\u003e\n\u003ctd\u003e~0.91 (ASTM C1371-15)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Reflectance Index (white)\u003c\/td\u003e\n\u003ctd\u003e~100.9 (ASTM E1980-11)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArtificial Weathering\u003c\/td\u003e\n\u003ctd\u003ePass, 1,000 hours UVA-340 (ASTM G154) — no cracking, blistering, delamination, chalking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eConsumption\u003c\/h2\u003e\n\u003ch3\u003eWaterproofing Without Reinforcement (Roof Refurbishment \/ Reflective Coating)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eLayer\u003c\/th\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eConsumption\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimer coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590 diluted with 10% water \/ Sikafloor-161 \/ Sikafloor-156\u003c\/td\u003e\n\u003ctd\u003e~0.3 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirst coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e~0.5 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecond coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e~0.5 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWaterproofing With Reinforcement (New Construction \u0026 Refurbishment)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eLayer\u003c\/th\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eConsumption\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimer coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590 diluted with 10% water \/ Sikafloor-161 \/ Sikafloor-156\u003c\/td\u003e\n\u003ctd\u003e~0.3 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirst coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e~0.3 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecond coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e~0.6 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReinforcement membrane\u003c\/td\u003e\n\u003ctd\u003eSikalastic® Fleece-80 \/ Sika® Glass Fabric -55G\u003c\/td\u003e\n\u003ctd\u003e1 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThird coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e~0.5 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinal coat\u003c\/td\u003e\n\u003ctd\u003eSikalastic-590\u003c\/td\u003e\n\u003ctd\u003e0.3–0.5 kg\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplication Conditions and Drying Times\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Temperature (ambient \u0026 substrate)\u003c\/td\u003e\n\u003ctd\u003e+15°C to +35°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Relative Humidity\u003c\/td\u003e\n\u003ctd\u003e80% r.h.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Moisture Content\u003c\/td\u003e\n\u003ctd\u003e\u003c 6%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDew Point\u003c\/td\u003e\n\u003ctd\u003eSurface temperature must be at least 3°C above dew point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDrying Stage\u003c\/th\u003e\n\u003cth\u003e+20°C \/ 50% r.h.\u003c\/th\u003e\n\u003cth\u003e+30°C \/ 50% r.h.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTouch Dry\u003c\/td\u003e\n\u003ctd\u003eApprox. 2 hours\u003c\/td\u003e\n\u003ctd\u003eApprox. 1 hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRain Resistant\u003c\/td\u003e\n\u003ctd\u003eApprox. 10 hours\u003c\/td\u003e\n\u003ctd\u003eApprox. 6 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFully Cured\u003c\/td\u003e\n\u003ctd\u003eApprox. 4 days\u003c\/td\u003e\n\u003ctd\u003eApprox. 2 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSikalastic-590 can be applied on roofs subject to short-term ponding water — recommended slope of at least 1% (minimum 0.5% depending on roof layout and drain availability)\u003c\/li\u003e\n\u003cli\u003eProtect applied material from rain until 24 hours after application to achieve good ponding water capability\u003c\/li\u003e\n\u003cli\u003eDo not apply on substrates with rising moisture\u003c\/li\u003e\n\u003cli\u003eAlways apply during falling ambient and substrate temperature — application during rising temperatures may cause \"pin holing\" from rising air (outgassing)\u003c\/li\u003e\n\u003cli\u003eTemperature must not drop below 15°C and humidity must not exceed 80% r.h. until membrane has fully cured\u003c\/li\u003e\n\u003cli\u003eEnsure each layer is totally dry and the surface is without pinholes before applying any top coat\u003c\/li\u003e\n\u003cli\u003eDo not allow temporary ponding between coats or until the final coating has totally cured — brush or mop surface water away\u003c\/li\u003e\n\u003cli\u003eIn cold climatic zones, do not apply on roofs subject to ponding water with subsequent freezing — provide slope of at least 3%\u003c\/li\u003e\n\u003cli\u003eDo not apply directly on insulation boards — use a separation layer between insulation board and Sikalastic-590\u003c\/li\u003e\n\u003cli\u003eSikalastic-590 is an exposed system — do not overcoat with tile, concrete or others\u003c\/li\u003e\n\u003cli\u003eSikalastic® Fleece-80 \/ Sika® Glass Fabric -55G can be used as total reinforcement or for partial reinforcements over dynamic cracks and joints\u003c\/li\u003e\n\u003cli\u003eClean all tools and equipment with water immediately after use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between Sikalastic-590 and Sikalastic-560?\u003c\/h3\u003e\n\u003cp\u003eSikalastic-590 has improved short-term ponding water capability, making it more suitable for roofs where drainage conditions may not be ideal and minor water accumulation may occur. Sikalastic-560 is not suitable for ponding water conditions. Additionally, Sikalastic-590 has a higher minimum application temperature (+15°C vs +8°C for 560) and shorter shelf life (12 months vs 18 months for 560). Both are waterborne liquid membranes with similar chemical bases.\u003c\/p\u003e\n\n\u003ch3\u003eCan Sikalastic-590 withstand permanent water immersion?\u003c\/h3\u003e\n\u003cp\u003eNo. Sikalastic-590 has improved short-term ponding water resistance but is not suitable for permanent or long-term water immersion. Roofs should maintain a minimum slope of 1% to ensure proper drainage.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the white Sikalastic-590 provide heat reflection?\u003c\/h3\u003e\n\u003cp\u003eYes, the white version achieves ~80% solar reflectance and SRI ~101, effectively reflecting solar heat to reduce roof surface temperature and building cooling costs. It has passed 1,000-hour artificial accelerated weathering testing with excellent anti-yellowing performance.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the coverage of Sikalastic-590?\u003c\/h3\u003e\n\u003cp\u003eUnreinforced system (primer + 2 coats): total approx. 1.3 kg\/m². Reinforced system (primer + 4 coats + reinforcement): total approx. 2.0–2.2 kg\/m². A 20 kg pail covers approximately 15 m² for the unreinforced system. Actual coverage depends on substrate conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow much does Sikalastic-590 cost?\u003c\/h3\u003e\n\u003cp\u003ePlease WhatsApp us for the latest Sikalastic-590 pricing. We offer self-pickup from our Mong Kok store and Hong Kong delivery service.\u003c\/p\u003e","brand":"Sika 西卡","offers":[{"title":"Default Title","offer_id":46352836755606,"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_b14b076d-89f0-414f-8a3c-6a5d22002033.png?v=1776681908","url":"https:\/\/wahhingwp.com\/en\/products\/sika-%e8%a5%bf%e5%8d%a1-sikalastic-591-%e8%81%9a%e6%b0%a8%e9%85%afpu%e6%8a%97%e7%b4%ab%e5%a4%96%e7%b7%9a%e5%bd%88%e6%80%a7%e9%98%b2%e6%b0%b4%e8%86%9c","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}