WAM® 93 LC – Alumina Based Low Cement Castable

WAM® 93 LC is a very high temperature, low cement castable, comprised primarily of a pure tabular alumina aggregate. The alumina content, purity and lower cement levels in this product permit the material to be suitable for use up to 3,300oF. Tabular alumina is a very high temperature aggregate and differs from both mullite and bauxite. Tabular alumina has a very high melting point but is susceptible to creep which is a tendency to deform at high temperatures under load. As such it is typically not recommended for long term, high temperature use as a support structure. However,  WAM® 93 LC contains a stoichiometric amount of reactant which when in combination with alumina forms mullite which counteracts the natural creep associated with pure alumina systems.


Westmoreland Advanced Materials, LLC low cement castable compositions incorporate the latest available technology in regards to particle size distribution, surfactants, and in-situ reactants that promote volume stability at temperature, density, non-reactivity, water demand, working time and placement characteristics. You will not find a superior product in the market place. It is available in several versions. The coarse version increases the material abrasion and impact resistance. Packages are made available for aluminum penetration resistance, and thermal shock resistance. A fine package is available for patching and intricate precast shapes. There is not an alkali resistant package for WAM® 93 LC.


WAM® 93 LC finds application in several areas as a very high temperature, thermal protection material also required to support a load. This includes walls, lintels, roof arches, and similar load bearing structures.

Typical Technical Data
WAM® 93 LC                                                                                            PDF Download

Classification:Low Cement Castable
Placement Method:Vibration Casting
Available Application Packages:AL - Aluminum Penetration Resistant
C - Coarse Aggregate
F - Fine Aggregate
TSR - Thermal Shock Resistant
Typical Water Requirement (%wt):4.5
Material Required for Estimating (lb/ft3):186
Maximum Recommended Service Temperature (°F):3300

Calculated wt.% Based on Common Oxides

Aluminum Oxide (Al2O3):93.0 %
Silicon Dioxide (SiO2):5.0 %
Titanium Dioxide (TiO2):<0.1 %
Iron(III) Oxide (Fe2O3):0.1 %
Calcium Oxide (CaO):1.6 %
Magnesium Oxide (MgO):<0.1%
Combined Alkali Oxide (Na2O + K2O):0.3 %


Modulus of
Rupture (psi)
Cold Crushing
Strength (psi)
Linear Change (%)
After 230190345018,530n/a
After 1500186467019,640-0.2
After 3000n/an/an/a+0.5

Additional technical data may be available. Please contact your sales representative for more information.
Data on this table represent typical properties and cannot be used for specification purposes.