🔥【Universal Refractory Mortar】 Powerful Bond, Defies Extreme Heat:​​ Specifically engineered for temperatures up to ​1420°C (2600°F)​,Masonry mortar for joining and repairing flue tiles in any fireplace (gas/wood) or stove (wood/coal/pellet). 👌【DIY & Pro Friendly】 Just Add Water & Go:​​ ​Refractory Mortar cement, just add water and trowel into place. No complex measuring required.Comes with detailed instructions and tips, making masonry ​joining and repairs simple and efficient. 🛠️【3-in-1 Versatility】 Mortar, Repair & Coating:​​ The ultimate choice not only for ​joining and repairing flue tiles, but also as a high-performance coating​ for building or restoring the interior of ​stove fireboxes, enhancing fire resistance, sealing, and surface smoothness. ✨【Durable & Professional Finish】 Sleek Dark Gray:​​ An optimized formula ensures ​superior durability, crack resistance, and air-tightness.Cures to a uniform, ​professional dark gray finish​ that blends naturally with firebrick, offering ​long-lasting performance without fading or crazing. 🧱【Fast-Setting Refractory Mortar】 Masonry & Fire Brick Repair and The Flue Seal & Repair Expert​.Three package sizes available: 11 lb, 22 lb, 44 lb. Reference value of usable area（Net volume = 44 lb/ 94 lb/ft³ ≈ 0.468 ft³; Net volume= 22 lb / 94 lb/ft³ ≈ 0.234 ft³; Net volume= 11 lb / 94 lb/ft³ ≈ 0.117 ft³）.

Fast-Setting Refractory Mortar –Masonry & Fire Brick Repair and The Flue Seal & Repair Expert​.
Engineered for sealing and repairing chimneys in all combustion systems,building a strong, durable fire barrier!
Three package sizes available: 11 lb, 22 lb, 44 lb.

Answering Customer Evaluation Questions：
Q: It didn't harden and bond like fireclay?
A: After the bricklaying is completed, it needs to be fired to harden and bond (Note: It must be fired once).

Q: Applied a layer about 1 inch thick and smoothed it, but the entire floor ended up cracking?
A: Apply a uniform layer (approx. 3-5mm/0.11inch thick) to the brick surface. Align and tap brick to expel excess, ensuring full joints.
⚠️WARNING: If the refractory mortar is applied too thick (exceeding 5mm/0.19inch) when laying firebricks, it is prone to cracking. This is because the thick mortar layer lacks internal support points. This must be avoided.

Product ingredients:​​
Aluminium Oxide​ - Al₂O₃ ≤65%
Silicon Dioxide​ - SiO₂ ≤ 32%
Ferric Oxide​ - Fe₂O₃ ≤2.2%
K₂O/CaO/Na₂O/TiO₂ ≤0.8%

🛠️ ​3-In-1 Professional Performance:​​
→ ​Seal & Repair:​​ Permanently fixes cracked flue tiles/liners.
→ ​Masonry Bonding:​​ Masonry & Fire Brick Repair.
→ ​Firebox Parging:​​ Apply as thin overlay coat to seal firebrick surfaces & improve combustion efficiency.

🧱Fast-Setting Refractory Mortar:
🔥 ​Core Applications (Fireplace & Stove Focused):​​​
→Sealing & Joining Flue Tiles:​​ Masonry & Fire Brick Repair Perfect for connecting, sealing, and repairing ​flue tiles​ in ​gas and wood fireplaces, as well as ​wood, coal, and pellet stove chimneys.
→Creating Smooth Firebox Walls:​​ Can be used as a thin ​coating​ applied to newly constructed firebox interiors, providing an ​even, aesthetically pleasing dark gray surface​ while enhancing structural density.

🧱 ​Performance Highlights:​​
1. Easy Operation, Ready-to-Use:​​ Simply ​add water and mix​ to achieve ideal working consistency – applies easily with a trowel!
2. Just Add Water - No Mixing Guesswork::​​ Pre-blended dry formula activates with water only (no special additives needed). Achieve perfect trowel-ready consistency in minutes.Includes foolproof mixing guide.
3. No Complex Curing Needed (Flexible Curing):​​ Air-cures rock-hard in 24 hours. Achieves high strength naturally upon curing ​​(no mandatory kiln firing required)​, saving you installation time.  (Pro Tip: If subsequently exposed to the heat of fireplace/stove operation (bake-in firing), its final strength becomes even greater!).
4. Long-Lasting & Reliable:​​ Specifically designed for the ​high-temperature, corrosive flue gas​ environment inside chimneys, offering reliable long-term sealing and protection.

🎨 ​Premium Finish:​​
Rich Charcoal Finish:​​ Cures to a ​uniform, durable, and attractive dark gray hue.

Refractory Mortar Usage Instructions：
​I. Preparation​
Material Check:​​ Confirm mortar grade matches the operating temperature. Check for lumps; crush and sieve if needed.  Do not use if severely deteriorated.
Surface Prep:​​ Clean substrate thoroughly (remove dust, oil, loose debris). Ensure it is dry and even. If overly dry, lightly dampen (no