{"product_id":"大禹-rg-21-雙組份環氧灌漿樹脂","title":"Da Yu RG-21 Two-component Injection Epoxy Resin","description":"\u003cdiv\u003e\u003cp\u003eDa Yu RG-21 is a two-component, low-viscosity injection epoxy resin. Its low viscosity before cure allows it to penetrate fine structural cracks, while its high post-cure bond strength suits concrete crack injection repair and new-to-old concrete bonding. Distributed by Wah Hing, most items are kept in stock.\u003c\/p\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eInjection repair of fine cracks in concrete, marble, metal and timber\u003c\/li\u003e\u003cli\u003eBonding new concrete to old\u003c\/li\u003e\u003cli\u003eWhen mixed with quartz sand or steel sand: repair of load-bearing roads, car parks and bridge decks\u003c\/li\u003e\u003cli\u003eStructural injection and anchorage work\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eLow viscosity for ready penetration into fine cracks\u003c\/li\u003e\u003cli\u003eHigh bond strength once cured; hard but not brittle\u003c\/li\u003e\u003cli\u003eNo shrinkage on cure\u003c\/li\u003e\u003cli\u003eResistant to water and chemicals\u003c\/li\u003e\u003cli\u003eSuitable for structural repair\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eProject References\u003c\/h3\u003e\u003cp\u003eThe Da Yu RG injection resin range has been used on major Hong Kong projects including the Western Harbour Crossing, KMB Sha Tin Depot, Taikoo Place, Carlton Building, Ying Cui Pun Tao, Beacon Hill and Discovery Bay.\u003c\/p\u003e\u003ch3\u003eApplication Notes\u003c\/h3\u003e\u003cp\u003eCracks must be cleaned of loose material and oil; injection ports should be set according to structural conditions. Mix the two components thoroughly at the specified ratio and inject immediately. Work should be carried out by experienced applicators following the TDS and the structural engineer's instructions. Refer to the TDS for mixing ratio, injection pressure and curing times.\u003c\/p\u003e\u003cp\u003eFor technical specifications, injection coverage estimates and order enquiries, please contact Wah Hing via WhatsApp.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How does RG-21 treat concrete cracks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"RG-21 is a low-viscosity injection resin that penetrates fine cracks for repair. Cracks must first be cleaned and injection ports set per the structural conditions; experienced applicators should follow the TDS.\"}},{\"@type\":\"Question\",\"name\":\"Can RG-21 bond new concrete to old?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Once cured, RG-21 develops high bond strength and is commonly used at new-to-old concrete interfaces as well as for structural anchorage. Follow the engineer's instructions and the TDS.\"}},{\"@type\":\"Question\",\"name\":\"Is it suitable for car parks or road decks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Mixed with quartz sand or steel sand, RG-21 can repair load-bearing roads, car parks and bridge decks, with anti-slip properties. Refer to the TDS for thickness and mix ratios.\"}},{\"@type\":\"Question\",\"name\":\"Can it be applied to damp surfaces or actively leaking cracks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Epoxy injection resins generally require clean, dry substrates; leaking or active cracks must first be addressed for water source and substrate condition. Follow the TDS and on-site assessment.\"}}]}\u003c\/script\u003e\u003c\/div\u003e","brand":"RG 大禹","offers":[{"title":"Default Title","offer_id":42397541859478,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/RG-21_-cover.jpg?v=1715920083","url":"https:\/\/wahhingwp.com\/en\/products\/%e5%a4%a7%e7%a6%b9-rg-21-%e9%9b%99%e7%b5%84%e4%bb%bd%e7%92%b0%e6%b0%a7%e7%81%8c%e6%bc%bf%e6%a8%b9%e8%84%82","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}