{"product_id":"富斯樂-fosroc-conbextra-hf-25kg","title":"Fosroc Conbextra HF","description":"\u003cdiv class=\"tldr-box\" style=\"background:#f0f4f8;border-left:4px solid #2c5282;padding:16px;margin-bottom:24px\"\u003e\u003cstrong\u003eTL;DR:\u003c\/strong\u003e\u003cp\u003eFosroc Conbextra HF is a precision non-shrink cementitious grout with a unique non-metallic dual expansion system that compensates for shrinkage in both the plastic and hardened states. It provides excellent flow and flow retention, ideal for bridge bearings, heavy machine bases, and crane rails. Suitable for potable water contact (per manufacturer).\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eConbextra HF is a shrinkage-compensated precision cementitious grout supplied as a ready-to-use dry powder. Adding a controlled amount of clean water produces a free-flowing precision grout. It is a blend of Portland cements, graded fillers, and chemical additives that impart controlled expansion in both the plastic and hardened states. The filler grading minimises segregation and bleeding over a wide range of application consistencies. The low water requirement ensures high early strength and long-term durability. It can be mixed to trowellable, flowable, or fluid consistency and is suitable for pumping or pouring.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eDual expansion system\u003c\/strong\u003e — Unique non-metallic system compensates for shrinkage in both plastic and hardened states\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eExcellent flow\u003c\/strong\u003e — Outstanding initial flow and flow retention\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eHigh early strength\u003c\/strong\u003e — Rapid early strength development facilitates early operation of plant\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eHigh ultimate strength and low permeability\u003c\/strong\u003e — Ensures durability of the hardened grout\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eHydrogen-free expansion\u003c\/strong\u003e — Gaseous expansion process does not produce hydrogen\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eChloride-free\u003c\/strong\u003e — Will not affect reinforcement\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eNon-metallic formulation\u003c\/strong\u003e — No metallic content to corrode and cause staining\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003ePotable water safe\u003c\/strong\u003e — Suitable for potable water contact (per manufacturer)\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eVersatile application\u003c\/strong\u003e — Can be pumped or poured across a wide range of consistencies and temperatures\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eHeavy-duty machine base plate precision grouting\u003c\/li\u003e\u003cli\u003eBridge bearing grouting\u003c\/li\u003e\u003cli\u003eCrane rail grouting\u003c\/li\u003e\u003cli\u003eHeavy-duty anchoring (bolts, starter bars, tendons, dowels)\u003c\/li\u003e\u003cli\u003eMinor concrete defect repair in new construction\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003ePackaging\u003c\/h2\u003e\u003cp\u003e25KG bags.\u003c\/p\u003e\u003ch2\u003eImportant Notes\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eUse warm water in low-temperature conditions to accelerate strength development\u003c\/li\u003e\u003cli\u003eStore mixed grout in shade and use cool water in high-temperature conditions\u003c\/li\u003e\u003cli\u003ePlace grout promptly after mixing to gain full benefit of the expansion process\u003c\/li\u003e\u003cli\u003eFormwork must be sealed leak-proof as HF is a free-flowing grout\u003c\/li\u003e\u003cli\u003ePour from one side continuously to prevent air or water entrapment under the base plate\u003c\/li\u003e\u003cli\u003eExposed grout surfaces must be properly cured\u003c\/li\u003e\u003cli\u003eShelf life is nine months in dry storage in original unopened bags\u003c\/li\u003e\u003cli\u003eProduct is alkaline — wear gloves, goggles, and dust masks during application\u003c\/li\u003e\u003cli\u003eFor detailed application methods, coverage rates, and technical parameters, please refer to the official product data sheet\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat is the difference between Conbextra HF and Conbextra GP?\u003c\/h3\u003e\u003cp\u003eHF is a precision grade with a dual expansion system (compensating for shrinkage in both plastic and hardened states), offering superior flow for bridge bearings, heavy machine bases, and long-distance flow applications. GP is a general-purpose grade with plastic-state expansion only, suited for standard grouting needs. Choose HF when precision and extended flow distance are critical.\u003c\/p\u003e\u003ch3\u003eCan Conbextra HF be used in contact with potable water?\u003c\/h3\u003e\u003cp\u003ePer manufacturer data, Conbextra HF is suitable for use in contact with potable water and has been approved under the relevant certification scheme.\u003c\/p\u003e","brand":"Fosroc 富斯樂","offers":[{"title":"Default Title","offer_id":43646834147478,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/fosroc_logo_company_brand.jpg?v=1760464107","url":"https:\/\/wahhingwp.com\/en\/products\/%e5%af%8c%e6%96%af%e6%a8%82-fosroc-conbextra-hf-25kg","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}