Laitite

Description:

Cemix Laitite is a fine, plastic, air-setting refractory mortar based on suitably graded and processed refractory aggregates with the requisite chemical and ceramic bonds. Cemix Laitite is supplied in a ready to use paste consistency, which air hardens at ambient temperatures and further hardens with application of heat to give a strong joint which exhibits low permeability to gas flow in the service temperature range up to 1400ºC.

Typical Applications & Uses:

Cemix Laitite finds a wide range of applications in furnaces or heat, or heat treatment plants, such as ceramic kilns, power plants, foundries, enamelling ovens, etc., or wherever a plastic air setting is required to operate in the service temperature range up to 1400ºC. Cemix Laitite is used straight from the container for applications such as laying, placing and jointing of firebricks and refractory shapes. Diluted with water as a protective wash - coating for furnace work and as an adhesive bond prior to patching, veneer coating etc. Mixed with refractory aggregate for application in thick joints (2 – 4mm), trowel patching, furnace wall repairs, construction of special shapes etc.

Advantages:

  • Ready to use paste straight from the container
  • Exhibits low premeability
  • Service temperature range of up to 1400°C
  • Can be diluted with water as a protective wash coating
  • Can be used as an adhesive bond prior to patching, veneer coating etc
  • Can be used for a wide range of applications such as ceramic kilns, power plants, foundries, enamelling ovens etc

1.75kg, 3.5kg, 7kg and 38kg

Substrate Preparation:

Firebricks must be dry and clean prior to application of Cemix® Latite.

Mixing:

Cemix® Latite comes as ready to use product.

Protective Wash Coating or Adehsive: Dilute with sufficient amount of clean water to achieve the required consistency.

Mixed with aggregate: For thick joints (2mm – 4mm) mix one volume of Cemix® Latite with half to one volume (according to thickness required) of crushed firebrick of a suitable mesh size.

Application:

Straight from container: For thin joints (1-2mm) apply to clean, dry, firebricks. Press bricks together and trowel off extruded cement.

Diluted with water: Dilute with sufficient clean water to give the required consistency for brushing, bagging or spraying as a protective surface wash for furnace work or as an adhesive bond prior to patching or applying rammed linings. Apply successive thin coatings, allowing each coat to dry out thoroughly before applying next coat. Porous insulting refractory brickwork should be given a wash coating with Cemix® Laitite suitably diluted with water, and allowed to dry before proceeding to set the bricks in the normal way.

Mixed with aggregate: For thick joints (2 - 4mm) trowelled patches, veneer coatings, furnace wall repairs, special shapes (boiler baffles), etc., mix one volume Cemix® Laitite with half to one volume (according to thickness required) of crushed firebrick of a suitable mesh size. In all cases, apply an initial bonding coat and a final protective coat of Cemix® Laitite suitably diluted with water. When urgent repairs are required, such as in hot patching, sealing retorts, sealing leaks in asbestos and iron flue pipes, etc., care must be taken to first heat the base work before applying a thin trowelled layer of Cemix® Laitite mixed with the requisite amount of crushed firebrick. Allow to dry before applying further thin layers to the required thickness.

Curing:

It is preferable to dry out Cemix® Laitite applications shortly after completion of the work. Use a slow fire bringing the temperature finally up to a minimum of 300ºC. Cemix® Laitite cures as a result of moisture evaporation from the sealant and the cure rate will be significantly impaired during cold conditions. For temperature around 5ºC - 18ºC cold conditions where extended cure time is needed, it is recommended to preheat the surface to around 30ºC before the application of Cemix® Laitite. During the extended cure time extra care must be taken to ensure the sealant does not suffer from water damage. Cemix® Laitite will not cure at temperature below 5ºC. In order to prevent premature hardening of the cement due to exposure in the atmosphere, keep drums well sealed when not in use.

Technical Data:

Appearance – Grey paste.

Yield / Coverage – Quantity required for laying dense fire bricks-trowelled joint 200 - 250kg/1000 bricks.

Packaging – 1.75kg, 3.5kg, 7kg and 38kg plastic pails.

Limitations:

Cemix® Latitie is not suitable for high build applications greater than 4mm.

Storage:

Cemix® Laitite can be stored for Twelve (12) months in original, unopened containers when stored in dry conditions between +5OC and +30OC. Keep containers closed in a well ventilated area when not in use. Do not expose to direct sunlight in storage. When a quantity of Cemix® Laitite is left in a container, level surface off and cover with a little water before replacing lid firmly.

Cleaning:

Clean all tools with water & brush immediately after use.