Alumina monolithic bottom solution


High-purity alumina concrete safety sublayer.

Typical application

ERPAL CAST is used in combination with ERPAL MORTAR as a safety layer under BPAL sintered alumina feeders to reduce risk of glass infiltration.

Must be vibrated with a beam during installation. For self-leveling application refer to ERGAL® SL CAST.

Chemical and physical properties

Typical chemical composition


Typical crystallographic analysis

  • corundum

Physical characteristics

Description International standards British standards
Maximum diameter 5mm 3Mesh
Typical bulk density 3.3g/cm3 206pcf

Instructions of use

Hydraulic setting with 4.5% drinkable water by weight.

Packaging and shelf life

  • 25kg bag
  • Must be properly stored up to expiry date in undamaged original sealed packaging, in dry conditions at temperatures between +5°C and +40°C

Related products


Sintered high-alumina 93%

High alumina content sintered material. Very good glass contact properties with the low glass defect potential.
Available in complex and large shapes.

Fused cast

Regular cast, electrofused 95% alumina (alpha-beta alumina)

Excellent glass contact properties with extremely low defect potential.
High resistant to alkali vapor and creep for superstructure application.