Plastic Mouldable Refractories

Plastic Mouldable Refractories for Industrial High-Temperature Applications

VITCAS manufactures specialist plastic mouldable refractories for professional repair and maintenance of refractory brickwork and monolithic linings in demanding high-temperature equipment. Supplied ready to use, these cohesive refractory materials can be shaped directly into prepared repair profiles and consolidated by hand or pneumatic ramming.

VITCAS plastic mouldable refractories are engineered for specific refractory duties, including rapid repair of damaged linings and specialist applications in electric induction furnaces. Product selection should consider the furnace or process zone, service temperature, bonding system, refractory chemistry, operating atmosphere, mechanical loading and contact with metal, slag, ash or other process materials.

Product Comparison

Product	Bond and form	Maximum service temperature	Installation	Typical applications
VITPLAST 45AB	Ceramically bonded, ready-to-use mouldable	1600°C / 2900°F	Hand ramming or pneumatic hammering	Rapid repair of refractory brick and monolithic linings, foundry ladles and launders, boiler doors, boiler linings and selected industrial furnace applications
VITPLAST 85P	High-alumina, chemically bonded, ready-to-use mouldable	1700°C / 3100°F	Air rammer or heavy hammer	Capping and spouts in electric induction furnaces

Industries & Applications

VITCAS plastic mouldable refractories support refractory maintenance and high-temperature applications across a wide range of industrial sectors:

• Marine & Ship Repair – ship boilers, marine boiler linings, incinerators and refractory repairs.
• Foundry & Metal Casting – ladles, launders, electric induction furnaces, capping and spouts.
• Steel & Metallurgical Industry – furnaces and refractory-lined high-temperature process equipment.
• Power Generation & Industrial Boilers – boiler doors, boiler linings and combustion equipment.
• Cement & Lime – kilns, furnaces and local refractory maintenance.
• Glass, Petrochemical & Process Industries – selected refractory-lined high-temperature equipment.

VITPLAST 45AB is designed primarily for rapid refractory repair and maintenance, while VITPLAST 85P provides a specialist high-alumina solution for defined electric induction furnace applications.

VITPLAST 45AB – Rapid Refractory Repair up to 1600°C

VITPLAST 45AB is a ready-to-use, ceramically bonded plastic refractory developed for fast and effective repair of compatible refractory brickwork and monolithic linings. Its cohesive mouldable consistency and strong adhesion to suitable refractory surfaces allow damaged areas to be rebuilt accurately without casting a fluid refractory material.

The material can be installed by hand ramming or pneumatic hammering. After compaction, furnace heat promotes rapid development of the ceramic bond, making VITPLAST 45AB particularly suitable for industrial maintenance where efficient refractory repair and controlled return to service are important.

Typical applications include foundry ladles and launders, boiler doors, boiler linings and industrial furnace maintenance. Suitable applications can also be found in steel and metallurgical plants, power generation, cement and lime production, glass manufacturing, marine boiler systems and selected petrochemical or chemical-process equipment.

For reliable performance, the application should be matched to the operating temperature, process atmosphere, mechanical conditions and chemistry of the existing refractory system.

VITPLAST 85P – High-Alumina Mouldable up to 1700°C

VITPLAST 85P is a chemically bonded, high-alumina plastic refractory developed for demanding applications in electric induction furnaces. With a maximum service temperature of 1700°C / 3100°F, it combines high-temperature stability, low shrinkage and good ramming characteristics.

Its principal applications are capping and spouts in electric induction furnaces, where controlled placement, reliable consolidation and dimensional stability are important to the refractory design.

VITPLAST 45AB and VITPLAST 85P are engineered for different refractory duties. VITPLAST 45AB is optimised for rapid lining repair, while VITPLAST 85P is designed specifically for high-alumina induction furnace details. Selection should therefore be based on the actual furnace zone, refractory chemistry and operating conditions as well as maximum service temperature.

Ceramic Bonding and Chemical Bonding

The bonding system is an important factor in refractory selection, installation and commissioning.

VITPLAST 45AB develops its durable ceramic bond through heating. Once correctly installed and compacted, controlled exposure to furnace heat establishes the high-temperature ceramic structure required for service.

VITPLAST 85P uses a chemical bonding system, giving it different installation and commissioning characteristics. Its high-alumina composition and chemically bonded structure are designed specifically for demanding induction furnace applications.

Bond type should be considered together with operating temperature, process atmosphere, refractory chemistry, thermal cycling and contact with process materials.

Plastic Mouldable, Castable, Mortar or Ramming Mix?

Refractory type	Typical installation method	Typical use
Plastic mouldable refractory	Placed in portions and compacted by hand or pneumatic ramming	Local repairs, shaped zones and refractory details requiring a cohesive material
Refractory castable	Mixed with controlled water and cast, poured or vibrated into position	Larger monolithic lining sections and formed refractory structures
Refractory mortar	Trowel applied in thin joints	Jointing compatible refractory bricks and shapes
Semi-dry ramming mix	Installed and compacted in controlled layers	Rammed linings, hearths, launders and selected furnace sections

Plastic mouldable refractories are particularly effective where the repair geometry benefits from a cohesive material that can be shaped and mechanically consolidated directly into the prepared refractory lining.

Refractory Repair Preparation

Correct preparation of the repair area is essential for reliable mechanical retention, consolidation and service performance. Damaged, contaminated or structurally weakened refractory should be removed until a sound and stable substrate is exposed.

• Remove loose, cracked, glazed or contaminated refractory.
• Cut back to a sound and mechanically stable boundary.
• Provide sufficient repair depth for effective retention and compaction.
• Avoid thin feather edges where reliable consolidation cannot be achieved.
• Remove dust and debris using a method suitable for the refractory and equipment.
• Inspect anchors, casing and adjacent refractory before installation.
• Follow the current VITCAS technical instructions for substrate preparation and installation.

A correctly prepared repair profile enables the mouldable refractory to be compacted uniformly and integrated effectively with the surrounding lining.

Ramming and Compaction

VITCAS plastic mouldable refractories are installed progressively in manageable portions. Each section should be compacted uniformly to fill the repair profile, establish good contact with the existing refractory and achieve consistent density.

Depending on the product and application, installation can be carried out using hand tools, a heavy hammer or suitable pneumatic ramming equipment. Particular attention should be given to corners, transitions and terminations to maintain continuity throughout the repair.

Effective compaction helps minimise voids and weak interfaces and produces a dense, mechanically stable refractory repair.

Ready-to-Use Refractory Materials

VITCAS plastic mouldable refractories are supplied ready to use, supporting efficient site installation and consistent material characteristics without the need for on-site formulation.

The supplied consistency is an integral part of the engineered refractory formulation. Water, binder or other modifiers should only be introduced where specifically authorised by the applicable VITCAS technical documentation, as changes to the supplied composition can affect compaction, shrinkage, pore structure, bonding and final high-temperature performance.

During installation, opened material should be protected from drying and contamination. Unused product should be stored in accordance with the relevant storage requirements.

Drying, Heating and Return to Service

Controlled drying and heat-up are important stages in achieving the intended refractory performance. Moisture and volatile components must be allowed to leave the installed material progressively while the designed bonding system develops.

For VITPLAST 45AB, furnace heat establishes the ceramic bond. VITPLAST 85P uses a chemical bonding system and therefore has different commissioning characteristics.

The appropriate heating programme should take account of the product, repair depth, retained moisture, ventilation, surrounding refractory and equipment design. Maximum service temperature defines the material's thermal capability under the specified conditions; it should not be used as a heat-up rate or commissioning schedule.

Engineering Selection Criteria

Maximum service temperature is an important refractory specification parameter, but optimum performance depends on the complete operating environment. Refractory engineers should also consider:

• Furnace, boiler or process equipment zone.
• Continuous and peak operating temperatures.
• Existing refractory chemistry and lining design.
• Oxidising, reducing or other process atmospheres.
• Contact with molten metal, slag, flux, ash or process deposits.
• Abrasion, erosion and gas velocity.
• Thermal cycling and thermal shock.
• Mechanical loading, vibration and movement.
• Repair geometry and available installation method.
• Drying, heating and commissioning requirements.

VITPLAST 45AB is rated to 1600°C / 2900°F and is designed primarily for compatible refractory repair applications. VITPLAST 85P is rated to 1700°C / 3100°F and is specifically developed for capping and spouts in electric induction furnaces.

This application-led approach allows engineers to select the appropriate VITCAS refractory according to the actual service duty rather than temperature rating alone.

Quantity Estimation

Material requirement should be calculated from the volume of the final prepared repair cavity after unsound refractory has been removed.

Measure the length, width and average depth of the prepared area and convert the resulting volume to material mass using the applicable published yield or installed-density data. Allow for irregular geometry, compaction, trimming and normal installation wastage.

Using the actual prepared repair dimensions provides more reliable material planning than estimating coverage from pack weight alone.

Storage and Handling

• Keep plastic mouldable refractory packaging sealed until required.
• Follow the specified storage-temperature requirements.
• Protect the material from drying, frost, excessive heat and contamination.
• Rotate stock using batch and expiry or use-by information.
• Use appropriate mechanical assistance or lifting procedures for heavy packs.
• Refer to the current VITCAS Safety Data Sheet before handling and installation.

Inspection and Refractory Maintenance Planning

Regular inspection allows refractory wear to be identified before local damage develops into a larger lining problem. After commissioning, repaired areas should be monitored together with the surrounding original lining for cracking, separation, erosion and changes in refractory thickness.

Useful maintenance records can include the VITCAS product and batch, repair location, dimensions, installation method, compaction procedure and heat-up programme. This supports consistent refractory maintenance and helps engineering teams assess wear patterns over successive service campaigns.

Application Limits and Specification Considerations

VITCAS plastic mouldable refractories are engineered for defined high-temperature duties. For optimum performance, the selected product should match the actual operating conditions and the existing refractory system.

• Different bonding systems and refractory chemistries are suited to different applications.
• Maximum service temperature should be considered together with furnace-zone conditions and lining design.
• Compatibility with molten metal, slag, flux, ash and process chemicals should be assessed for the specific duty.
• Adjacent refractory materials, anchors, joints and other lining components may have different operating limits.
• The supplied ready-to-use consistency should be maintained unless modification is specifically authorised in VITCAS technical documentation.
• Product-specific drying and heat-up requirements should form part of the installation and commissioning procedure.

For severe operating environments, unusual process conditions or applications where the existing refractory system is uncertain, the relevant VITCAS technical information should be reviewed as part of the engineering specification.

Why Specify VITCAS Plastic Mouldable Refractories?

• Specialist refractory manufacturing expertise for professional high-temperature applications.
• Engineered formulations developed for clearly defined refractory duties.
• Ready-to-use materials for efficient and consistent installation.
• High-temperature capability for demanding industrial environments.
• Rapid refractory repair solutions for compatible brick and monolithic linings.
• Specialist high-alumina technology for electric induction furnace applications.
• Applications across multiple industrial sectors, including foundry, metallurgy, marine, boilers, power generation and process industries.
• Engineering-led product selection based on refractory chemistry, bonding system, temperature and actual service conditions.

By combining specialist refractory manufacturing expertise with application-focused material technology, VITCAS provides engineers and maintenance teams with practical, high-performance solutions for refractory repair and high-temperature industrial applications.

Frequently Asked Questions

What is a plastic mouldable refractory?

A plastic mouldable refractory is a cohesive, ready-prepared monolithic refractory that can be shaped and compacted directly into a lining or repair profile. The term “plastic” refers to the material's mouldable consistency before bonding and hardening.

What is VITPLAST 45AB used for?

VITPLAST 45AB is developed primarily for rapid repair of compatible refractory brickwork and monolithic linings. Typical applications include foundry ladles and launders, boiler doors, boiler linings and industrial furnace maintenance.

What is VITPLAST 85P used for?

VITPLAST 85P is a chemically bonded, high-alumina mouldable developed specifically for capping and spouts in electric induction furnaces.

What is the difference between VITPLAST 45AB and VITPLAST 85P?

VITPLAST 45AB is a ceramically bonded mouldable optimised for rapid refractory repair and rated to 1600°C / 2900°F. VITPLAST 85P is chemically bonded, has a high-alumina composition, is rated to 1700°C / 3100°F and is designed for specialist electric induction furnace applications.

Which product has the higher maximum service temperature?

VITPLAST 85P is rated to 1700°C / 3100°F, while VITPLAST 45AB is rated to 1600°C / 2900°F. Temperature rating is one part of specification; the application, furnace zone, refractory chemistry and operating environment should also be considered.

Are VITCAS plastic mouldable refractories ready to use?

Yes. Products such as VITPLAST 45AB and VITPLAST 85P are supplied in a ready-to-use mouldable consistency for ramming and compaction.

How are plastic mouldable refractories installed?

The refractory is placed progressively into a correctly prepared repair area and consolidated using hand tools, a heavy hammer or suitable pneumatic ramming equipment according to the product and application.

Can VITPLAST 45AB be used for refractory brick repairs?

Yes. Rapid repair of compatible refractory brickwork and monolithic linings is one of the principal applications of VITPLAST 45AB.

Can VITPLAST 45AB be used in foundries?

Yes. Typical foundry applications include refractory repair of ladles and launders, together with other compatible high-temperature lining maintenance.

Can VITPLAST 45AB be used in marine boilers?

Yes. VITPLAST 45AB can be used for suitable refractory maintenance in marine boiler systems. The specific boiler zone, existing refractory, operating conditions and commissioning procedure should be considered during specification.

Which VITCAS mouldable is used in electric induction furnaces?

VITPLAST 85P is specifically developed for capping and spouts in electric induction furnaces. Its chemically bonded, high-alumina formulation is designed for these demanding furnace details.

Which industries use VITCAS plastic mouldable refractories?

Applications include foundry and metal casting, marine and ship repair, steel and metallurgy, power generation and industrial boilers, cement and lime production, glass manufacturing and selected petrochemical and high-temperature process industries.

How should a plastic mouldable refractory be selected?

Selection should be based on the actual refractory duty, including service temperature, furnace or equipment zone, bonding system, refractory chemistry, process atmosphere, contact materials, thermal cycling, mechanical wear and installation requirements.

How much plastic mouldable refractory is required?

Calculate the volume of the final prepared repair cavity and convert this to material mass using the applicable density or yield information. Include an allowance for compaction, irregular geometry, trimming and normal installation wastage.

What information is useful when specifying a VITCAS mouldable refractory?

Useful engineering information includes the equipment and furnace zone, operating temperature, existing refractory chemistry, process atmosphere, contact with metal, slag or other process materials, mechanical wear, repair dimensions, installation method and commissioning conditions.

Where can refractory engineers obtain further technical information?

For demanding industrial refractory applications, refer to the current VITCAS technical and safety documentation or contact VITCAS with details of the equipment, process conditions and existing refractory system to support appropriate product selection.