{"product_id":"sika-sikaflex-521-uv-300ml-ms-polymer-sealant-flexible-paintable-adhesive-for-automotive-marine-and-construction-joint-sealing","title":"Sika Sikaflex 521 UV 300ml MS Polymer Sealant Flexible Paintable Adhesive for Automotive Marine and Construction Joint Sealing","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNONE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDIY Supplies\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eWoodworking\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSikaflex 521 UV\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSealers\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\u003cdiv class=\"detailmodule_image\"\u003e\n\u003ch1\u003eSIKAFLEX®-521 UV – MULTI-PURPOSE ELASTIC SEALANT (300 ml)\u003c\/h1\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eHigh-performance, \u003cstrong\u003eUV-resistant\u003c\/strong\u003e, \u003cstrong\u003eone-component elastic sealant\u003c\/strong\u003e based on \u003cstrong\u003eSika Silane-terminated polymer (STP) technology\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eExcellent adhesion to a wide range of substrates without primer\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003ePermanent elasticity and high weathering resistance\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eNon-corrosive, solvent-free, and isocyanate-free formulation\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eResistant to aging, cracking, and sunlight exposure\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eCan be painted and sanded once cured\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eIdeal for indoor and outdoor industrial sealing applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eAvailable in 300 ml cartridges (white, grey, or black)\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eSikaflex®-521 UV is a high-quality, elastic, moisture-curing sealant designed for long-term sealing and bonding in industrial, transportation, and construction applications.\u003cbr\u003e It combines excellent UV stability with strong adhesion to metals, plastics, ceramics, and painted surfaces — even without primers.\u003cbr\u003e The product forms a durable, weatherproof seal resistant to vibration, temperature variation, and moisture exposure.\u003cbr\u003e Its non-corrosive formulation ensures compatibility with sensitive materials and surfaces such as aluminum, GRP, and steel.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\"\u003e\u003ctable class=\"w-fit min-w-(--thread-content-width)\" style=\"border-collapse:collapse\"\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" style=\"text-align:center\"\u003e\u003cp\u003eParameter\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" style=\"text-align:center\"\u003e\u003cp\u003eTypical Value\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eChemical Base\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eSilane Terminated Polymer (STP)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eAppearance\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eSmooth paste\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eColor\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eWhite \/ Grey \/ Black\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eDensity (23 °C)\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~1.4 g\/cm³\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eSkin Forming Time (23 °C \/ 50% RH)\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~60 min\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eCuring Speed (23 °C \/ 50% RH)\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~3 mm per 24 h\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eShore A Hardness\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~45\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eTensile Strength\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~2.0 MPa\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eElongation at Break\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e~400%\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eTemperature Resistance\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e–40 °C to +90 °C (short term +120 °C)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eUV Resistance\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eExcellent\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003ePaintability\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eYes (wet-on-wet possible)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eShelf Life\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e12 months (in unopened cartridge)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003ePackaging\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e300 ml cartridge\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003chr\u003e\n\u003ch3\u003eApplication Fields\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eVehicle body, bus, trailer, and caravan sealing\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eConstruction and industrial assembly joints\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eMarine, rail, and renewable energy equipment\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eRoof, floor, and wall joint sealing where UV resistance is required\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eIdeal replacement for silicone or polyurethane sealants in exposed environments\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCertifications \u0026amp; Quality Assurance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eGenuine Sika® industrial-grade sealant\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eManufactured under ISO 9001 \/ ISO 14001 quality management systems\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eConforms to EC Directive 2004\/42\/EC (VOC regulations)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eMeets industrial and transportation OEM specifications\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eStorage \u0026amp; Handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eStore unopened at temperatures between +5 °C and +25 °C in dry conditions\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eProtect from direct sunlight and freezing\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eUse only on clean, dry, dust-free surfaces\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eFor best results, apply with manual or pneumatic caulking gun\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eRemove uncured sealant with Sika Remover-208 or suitable solvent\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003ePackage \u0026amp; Shipping\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eSupplied in \u003cstrong\u003e300 ml cartridge\u003c\/strong\u003e (white, grey, or black)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eLeak-proof, durable packaging for workshop or field use\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eClassified as \u003cstrong\u003enon-dangerous goods\u003c\/strong\u003e for air, land, and sea transport\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWarm Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eEnsure surfaces are clean and grease-free before application\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eApply as continuous bead; tool within 15 minutes for best finish\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003ePaintability depends on paint type — test beforehand\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eNot suitable for glazing or structural bonding applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eReplace cap immediately after use to avoid curing in nozzle\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6e1229656c444115b2bfc735cf569244c.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S2242483764064778b7906af5d2e786c1S.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9300837fb41847b5bcc2df1473f8c6ab8.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sc3f585ac72a145548758d1c88c9bec3dp.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sfa6c4bb3eb084f728e80c6ac626ea39et.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S80ff22f7b05045d8a0ac0e142ab9522aQ.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S635d12c594b84fb7bfcec20af86858deG.jpg?width=750\u0026amp;height=1182\u0026amp;hash=1932\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9834aa7838304b7c862f8e4b50ebd433Q.jpg?width=750\u0026amp;height=1066\u0026amp;hash=1816\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S34fb3cac36404792b57c98054f57f71aO.jpg?width=750\u0026amp;height=402\u0026amp;hash=1152\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sa29eb9c4d41b4586b2c7bbd2d5c4c766P.jpg?width=750\u0026amp;height=1011\u0026amp;hash=1761\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e","brand":"DollarStoreShop.com","offers":[{"title":"521UV  Gray  300ml","offer_id":55405839122737,"sku":"14:771#521UV  Gray  300ml","price":40.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/1324\/2929\/files\/S6e1229656c444115b2bfc735cf569244c.webp?v=1784789187","url":"https:\/\/dollarstoreshop.com\/products\/sika-sikaflex-521-uv-300ml-ms-polymer-sealant-flexible-paintable-adhesive-for-automotive-marine-and-construction-joint-sealing","provider":"DollarStoreShop.com","version":"1.0","type":"link"}