Refractory Mortars

Ready-Mixed Refractory Mortar for Fire Bricks

Refractory mortar for fire bricks is designed to form thin, stable joints between compatible refractory materials. It can be used for both new installations and repair work, helping maintain the integrity of refractory linings exposed to repeated heating and cooling.

Depending on the selected grade, VITCAS refractory mortars are suitable for applications including:

• Furnaces and furnace linings
• Kilns and kiln equipment
• Foundries and metalworking installations
• Steel production equipment
• Industrial heating systems
• Refractory brick repairs and maintenance
• Precast refractory shapes
• Insulating fire brick systems

The appropriate mortar should always be matched to the type of refractory material, operating temperature and conditions of the installation.

Mortars for Dense and Insulating Fire Bricks

Different refractory materials require different mortar formulations. VITCAS Silcas mortars provide solutions for applications such as setting and jointing fire bricks and lightweight insulating materials. Silcas M is an off-white refractory mortar particularly suited to lightweight insulating fire bricks and applications where the appearance of the finished joint is important.

For higher-temperature installations, the Vitset range provides specialist refractory mortars for applications involving dense refractory bricks, insulating bricks and selected ceramic fibre products. These formulations are intended for increasingly demanding service conditions, with maximum temperature ratings of up to 1860°C depending on the grade selected.

High-Alumina Refractory Mortars for Industrial Use

High-alumina refractory mortars are intended for demanding industrial environments where refractory linings are exposed to particularly high temperatures. Selected Vitset grades are suitable for applications in sectors such as steel production, foundries and other high-temperature processing industries.

Depending on the product, application methods may include trowelling, setting, dipping, coating or spraying. Specialist grades are also available for applications involving high-alumina bricks, treatment vessels, precast refractory shapes and other refractory components.

How to Choose the Right Refractory Mortar

Choosing the correct high-temperature mortar depends primarily on the maximum service temperature and the type of refractory material being installed. The intended application and installation method should also be taken into account.

For lightweight insulating fire bricks, select a mortar specifically compatible with insulating refractory materials. Dense refractory brickwork and severe industrial conditions may require a higher-alumina grade with a higher maximum service temperature.

Always check the individual product specification before use, particularly for maximum temperature, compatible materials, application method, recommended joint thickness and curing requirements.

VITCAS Refractory Mortars

The VITCAS range includes refractory mortars for applications from general fire brick jointing to specialised industrial refractory installations. With ready-mixed formulations available for different refractory materials and service temperatures, the range provides solutions for construction, maintenance and repair work in high-temperature environments.

Browse the products above to compare temperature ratings, applications and material compatibility and select the most suitable refractory mortar for your project.

Refractory Mortar FAQs

What is refractory mortar?

Refractory mortar is a heat-resistant bonding material developed for setting and jointing fire bricks and other refractory materials. It is designed for high-temperature environments where conventional masonry mortar would not be suitable.

What temperature can refractory mortar withstand?

The maximum service temperature depends on the formulation. VITCAS refractory mortars in this category are available with temperature ratings from 1400°C up to 1860°C. Always select a mortar with a temperature rating appropriate for the intended installation.

Can refractory mortar be used with fire bricks?

Yes. Refractory mortar is specifically designed for setting and jointing compatible fire bricks and refractory shapes. Different formulations are available for dense refractory bricks and lightweight insulating fire bricks, so the mortar should be selected to suit the material being installed.

Are VITCAS refractory mortars ready mixed?

Yes. The refractory mortars in this category are supplied ready mixed, providing a consistent working consistency without the need to proportion dry ingredients on site. Individual products should be prepared and applied in accordance with their specific instructions.

Can refractory mortar be used for repairs?

Yes. Suitable refractory mortars can be used for maintenance and repair work, including repairing joints, patching refractory areas and securing compatible refractory materials. The correct grade will depend on the substrate, service temperature and type of repair.

How do I choose the right refractory mortar?

Consider the maximum operating temperature, the type of fire brick or refractory material, the application method and the conditions in which the lining will operate. Lightweight insulating bricks and dense high-alumina refractories may require different mortar formulations, so always refer to the individual product specification before use.