{"product_id":"fosroc-renderoc-岩補-hb40","title":"Fosroc Renderoc HB40","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 Renderoc HB40 is a medium-weight concrete reinstatement mortar designed for vertical and overhead repair work. Its polymer-modified formulation provides extremely low permeability, while its natural alkalinity protects embedded steel reinforcement. Tested and approved under the PCCS-RM TM1 to TM6 scheme (per manufacturer). Single-component — just add water.\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eRenderoc HB40 is a ready-to-use blend of dry powders that requires only the site addition of clean water to produce a highly consistent, medium-weight repair mortar. Based on Portland cements, graded aggregates, lightweight fillers, and chemical additives, it provides good handling characteristics while minimising water demand. The low water requirement ensures fast strength gain and long-term durability. The material is naturally alkaline, protecting embedded steel reinforcement from corrosion. It is suitable for both large-area concrete reinstatement and small localised patch repairs. The cured mortar is highly impermeable to acid gases, chloride ions, oxygen, and water.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eMedium-weight high-build formulation\u003c\/strong\u003e — Saves time and cost of multiple applications\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eNo formwork required\u003c\/strong\u003e — Can be applied in a single pass on vertical and overhead surfaces to appropriate thickness without formwork\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eExtremely low permeability\u003c\/strong\u003e — Polymer modification provides effective resistance to water, carbon dioxide, and chlorides\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eExcellent bond strength\u003c\/strong\u003e — Strong adhesion to the concrete substrate\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eExceptional shrinkage compensation\u003c\/strong\u003e — Systematic shrinkage compensation mechanism reduces cracking risk\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eSingle-component pre-bagged\u003c\/strong\u003e — Just add water; pre-packaged formulation eliminates site-batching variations\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eNo chloride admixtures\u003c\/strong\u003e — Will not accelerate reinforcement corrosion\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eReinforcement protection\u003c\/strong\u003e — Natural alkalinity provides corrosion protection for embedded steel\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eLarge-area concrete reinstatement (spalling repairs)\u003c\/li\u003e\u003cli\u003eSmall localised patch repairs\u003c\/li\u003e\u003cli\u003eVertical and overhead concrete repair\u003c\/li\u003e\u003cli\u003eConcrete spalling caused by reinforcement corrosion\u003c\/li\u003e\u003cli\u003eStructural repairs requiring a medium-weight repair mortar\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\u003eNot suitable for application when temperature is low and falling\u003c\/li\u003e\u003cli\u003eDo not mix part bags\u003c\/li\u003e\u003cli\u003eNot suitable for areas subject to vehicular or heavy traffic due to its medium-weight formulation\u003c\/li\u003e\u003cli\u003eHeavy rainfall before final set may cause surface scour\u003c\/li\u003e\u003cli\u003eMust be cured after repair in accordance with good concrete practice\u003c\/li\u003e\u003cli\u003eShelf life is nine months in unopened packs stored in dry conditions\u003c\/li\u003e\u003cli\u003eWear gloves, eye protection, 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 Renderoc HB40 and HB25?\u003c\/h3\u003e\u003cp\u003eBoth are medium-weight repair mortars in the Renderoc range, but HB40 is a higher strength grade suitable for structural repairs with greater strength requirements. HB25 is a lower strength grade that allows thicker single-pass application on vertical surfaces. Select the appropriate grade based on the project's strength requirements.\u003c\/p\u003e\u003ch3\u003eWhat priming is needed before applying HB40?\u003c\/h3\u003e\u003cp\u003eExposed reinforcing steel should first be coated with Nitoprime Zincrich WB anti-corrosion primer. The concrete substrate should be thoroughly soaked, then a Nitobond SBR cement slurry bond coat should be scrubbed into the surface. Apply the repair mortar as soon as the bond coat becomes tacky.\u003c\/p\u003e","brand":"Fosroc 富斯樂","offers":[{"title":"Default Title","offer_id":42397814128790,"sku":"","price":1.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9027\/1382\/files\/HB40.jpg?v=1778740125","url":"https:\/\/wahhingwp.com\/en\/products\/fosroc-renderoc-%e5%b2%a9%e8%a3%9c-hb40","provider":"華興建築防水材料有限公司","version":"1.0","type":"link"}