Batimix Mortar W-821 Z

Waterproofing slurry for sewage treatment plants


BATIMIX Mortar W-821 Z is a surface-applied cementitious-based material. It is resistant to water and moisture and used in sewage purification plants for sealing against groundwater containing sulfate. It is made from Type V Portland cement, carefully-graded sand, and a combination of selected waterproofing additives.

BATIMIX Mortar W-821 Z is employed against active or passive water pressure surfaces. Its adhesion strength is excellent, making it suitable for application to horizontal as well as vertical surfaces. It is durable and resistant to frost and heat after setting.

Main Purpose

Batimix Mortar W 821-Z is used for waterproofing applications of basement retaining walls, concrete slabs (roof, balcony, …), channels, bridges, construction joints, swimming pools, and water retaining structures.


BATIMIX Mortar W 821-Z has the following characteristics:

  • Ready-to-use, ensuring consistent properties of the fresh and hardened product
  • Can be applied to all structurally sound pressure or non-pressure concrete faces – new or old
  • High degree of adhesion/bond to the substrate\
  • Extremely-low water absorption, yet increased water vapor transmission
  • Improved sulfate resistance and overall durability






  • 25KG Paper Bag

Health & Safety

BATIMIX Mortar W-821 Z contains cement that is irritating to the eyes and skin. In case of contact, rinse immediately with plenty of water. Wear suitable gloves. For further information, kindly refer to the product's Material Safety Data Sheet.