Overview
Two-component fireproof grouting material is a reactive system combining a powdered base (Component A) with a liquid activator (Component B). When mixed, it expands and hardens into a fire-resistant foam, sealing gaps to prevent flame and smoke propagation. It is engineered for high-temperature stability, often achieving 2–4 hours of fire resistance per international standards like UL 1479 or GB/T 9978. Primarily used in commercial and industrial construction, this material is critical for passive fire protection systems. Its dual-component design ensures precise curing control, making it suitable for irregular or hard-to-reach spaces where traditional fireproofing methods fail.
Physical and Chemical Properties
The uncured material exhibits a shelf-stable powder-liquid form, with Component A typically containing cementitious binders and refractory fillers, while Component B includes catalysts and expansion agents. Upon mixing, a rapid chemical reaction generates gas, causing the material to expand 2–3 times its original volume and form a lightweight, insulating char when exposed to fire. Key metrics include a post-cure density of 0.8–1.2 g/cm³ and compressive strength of 1.5–3 MPa. The cured grout is alkali-resistant (pH ~11) and adheres firmly to substrates like concrete, steel, and PVC. It maintains structural integrity at temperatures exceeding 1,000°C, with low thermal conductivity (~0.1 W/m·K).
Main Applications
This grout is specified for fire-rated penetration seals in walls/floors, including electrical cable trays, plumbing pipes, and HVAC ducts. It is mandatory in high-rise buildings, tunnels, and data centers where compartmentalization is required by fire codes. The material also serves as a crack filler for fire doors and curtain walls. Beyond construction, it is used in shipbuilding and oil/gas facilities to seal bulkhead penetrations. Recent innovations include formulations for seismic-prone areas, where flexibility complements fire resistance. Designers favor it for its aesthetic finish, which accepts paints or plaster coatings.
Safety and Storage
Pre-cured components require standard chemical handling: avoid inhalation of dust (Component A) and skin contact with the liquid (Component B). Mixing must occur in ventilated areas, as the reaction may release trace ammonia. Once cured, the material is inert and non-hazardous. Storage life is typically 12 months in original, unopened packaging at 5–30°C. Moisture exposure causes premature curing in Component A, while freezing degrades Component B. Bulk procurement should align with project timelines to prevent shelf-life expiration. Disposal follows local regulations for non-hazardous construction waste.
B2B Procurement Guide
Procure from suppliers with third-party fire test reports (e.g., UL, LPCB, or CNAS certifications). Key specifications to request include expansion ratio, fire endurance time, and substrate compatibility. For large projects, negotiate batch testing to ensure consistency. Pricing depends on fire rating (e.g., 2-hour vs. 4-hour) and order volume. Container-load purchases (20+ tons) commonly reduce costs by 10–15%. Lead times vary from 1 week (stocked items) to 4 weeks (custom formulations). Consider logistics—bagged Component A and drummed Component B require palletized shipping.
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