{"product_id":"sikaflex-521uv-adhesive-and-sealant-300ml","title":"Sikaflex 521UV Adhesive and Sealant 300ml","description":"\u003cli\u003eSikaflex 521UV Adhesive and Sealant 300ml is a weathering‑resistant, one‑component Silane Terminated Polymer (STP) adhesive and sealant designed for versatile internal and external applications. This sikaflex 521uv adhesive and sealant 300ml formulation bonds effectively to a wide variety of substrates, including metals, ABS, PC, FRP and wood, typically without the need for special pre‑treatment.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003eThe product provides excellent ageing and UV resistance, making it suitable for outdoor environments and long‑term sealing applications. Its isocyanate‑free and solvent‑free chemistry ensures safer handling and compatibility with sensitive materials. Sikaflex 521UV Adhesive and Sealant 300ml can be overpainted and sanded once cured, offering flexibility for finishing and integration into surrounding surfaces.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003eWith low odour and strong adhesion performance, Sikaflex 521UV Adhesive and Sealant 300ml is ideal for construction, manufacturing, vehicle assembly, maintenance and general sealing tasks where durability and substrate versatility are essential.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eProduct Benefits\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cul\u003e\n\u003cli\u003eAgeing and weathering‑resistant\u003c\/li\u003e\n\u003cli\u003eBonds well to a wide variety of substrates without special pre‑treatment\u003c\/li\u003e\n\u003cli\u003eIsocyanate‑ and solvent‑free\u003c\/li\u003e\n\u003cli\u003eCan be overpainted\u003c\/li\u003e\n\u003cli\u003eCan be sanded\u003c\/li\u003e\n\u003cli\u003eLow odour\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommon Applications for Sikaflex 521UV Adhesive and Sealant 300ml\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cul\u003e\n\u003cli\u003eExternal sealing — UV‑exposed joints and outdoor applications\u003c\/li\u003e\n\u003cli\u003eInternal sealing — general construction and assembly joints\u003c\/li\u003e\n\u003cli\u003eVehicle assembly — bonding and sealing in automotive and transport sectors\u003c\/li\u003e\n\u003cli\u003eManufacturing — multi‑material bonding and sealing tasks\u003c\/li\u003e\n\u003cli\u003eMaintenance — repair and sealing of mixed‑substrate installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eHow to Apply Sikaflex 521UV Adhesive and Sealant 300ml\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cul\u003e\n\u003cli\u003eSurface preparation — ensure surfaces are clean and dry; special pre‑treatment usually not required\u003c\/li\u003e\n\u003cli\u003eApplication — apply using a standard cartridge gun\u003c\/li\u003e\n\u003cli\u003eTooling — smooth the sealant immediately for a clean finish\u003c\/li\u003e\n\u003cli\u003eCuring — allow full cure before painting or sanding\u003c\/li\u003e\n\u003cli\u003eFinishing — overpaint or sand once cured if required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cli\u003e\n\n\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eFAQs for Sikaflex 521UV Adhesive and Sealant 300ml\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cul\u003e\n\u003cli\u003eDoes it need special pre‑treatment? — usually no, bonds well to many substrates directly\u003c\/li\u003e\n\u003cli\u003eIs it UV‑resistant? — yes, designed for weathering and ageing resistance\u003c\/li\u003e\n\u003cli\u003eCan it be overpainted? — yes, once fully cured\u003c\/li\u003e\n\u003cli\u003eIs it solvent‑free? — yes, also isocyanate‑free\u003c\/li\u003e\n\u003cli\u003eDoes it have low odour? — yes, suitable for indoor applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/gbr.sika.com\/en\/industry\/transportation\/sealants\/sikaflex-521-uv.html\" rel=\"noopener\" target=\"_blank\"\u003eFor further information on this product, please click the link to visit the Manufacturer’s website.\u003c\/a\u003e\u003c\/p\u003e","brand":"Sika","offers":[{"title":"Black","offer_id":49173969633622,"sku":"80006-B","price":18.89,"currency_code":"GBP","in_stock":false},{"title":"Grey","offer_id":49173969666390,"sku":"80006-G","price":18.89,"currency_code":"GBP","in_stock":false},{"title":"White","offer_id":49189037834582,"sku":"80006","price":18.89,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0866\/2846\/7030\/files\/sika521.png?v=1747087549","url":"https:\/\/alscoltd.co.uk\/products\/sikaflex-521uv-adhesive-and-sealant-300ml","provider":"Alsco Ltd","version":"1.0","type":"link"}