Refractory mortar is a specially formulated material used to bond firebricks and other refractory shapes in high-temperature industrial applications. It provides strong adhesion, chemical stability, and thermal resistance, ensuring the structural integrity of refractory linings under extreme conditions.

What Is Refractory Mortar?

Refractory mortar is a fine-grained, heat-resistant paste made from fireclay, alumina, silica, and chemical binders. It can withstand temperatures of up to 1700–1800°C, depending on its composition. After application and curing, it forms a durable joint that resists heat, slag, and thermal shock.

Key Advantages:

• High-temperature resistance — maintains strength at extreme heat;
• Strong bonding — ensures reliable brickwork stability;
• Easy to apply — by trowel or squeeze joint method;
• Resistant to corrosion — protects against slag, alkalis, and acids;
• Available in air-setting and heat-setting grades.

Applications:

• Firebrick and insulating brick linings
  Furnace walls and arches;
• Pizza ovens, fireplaces, and chimneys
  Kilns and incinerators;
• Petrochemical, cement, and steel industry linings;

Types of Refractory Mortars:

• Air-setting mortars — set at ambient temperature; ready for heat after curing;
• Heat-setting mortars — require heat to develop full strength;
• Alumina-based mortars — for high-duty applications;
• Silica-based mortars — for coke ovens and acid-resistant applications;
• Phosphate-bonded mortars — chemical-set types for high-performance needs.