Koster Deuxan 2C is a BBA approved primary waterproofer for external tanking. It is a robust, crack-bridging, 2-component, polymer-modified bitumen thick film sealant for waterproofing construction.

Koster Deuxan 2C is designed for the secure and permanent exterior waterproofing of basement walls, foundations, floorplates and for intermediate waterproofing of balconies and terraces, as well as for wet and damp rooms. Koster Deuxan 2C is also suited for the intermediate waterproofing underneath screeds and for bonding insulation and drainage boards.

Koster Deuxan 2C bridges cracks of the substrate safely and against pressurised water. Koster Deuxan 2C is radon-proof.

Applications

Koster Deuxan 2C provides safe and permanent outside waterproofing for basement walls, foundations, floorplates etc, and provides intermediate waterproofing of balconies and terraces. Since applications of waterproofing are carried out depending on the water-loading conditions, these have to be determined exactly by the planner prior to application.

This waterproofer has been successfully used for many years in load conditions of pressurised water (consumption min. 6kg/m²).

It is also suited for the intermediate waterproofing underneath screeds and for bonding insulation- and drainage-boards.

Features, benefits and applications

  • BBA Approved

  • Koster Deuxan 2C is satisfactory for use as a fully bonded, Type A Barrier protection waterproofing as defined in BS 8102:2022 for waterproofing of new and existing structures

  • Positive side waterproofing against pressurized water

  • Can be used externally on concrete, brickwork, blockwork or masonry

  • Impervious to water and will act as a waterproof layer

  • Easy application

  • Seamless application

  • Suitable for new construction and repair on existing structures

  • Suitable for waterproofing basements (horizontal and vertical surfaces)

  • Possess excellent pressure and abrasion resistance

Specification

  • Product Code: DMS 169

  • Size: 32kg

  • Material: bitumen / rubber with a reactive powder

  • Pot life: Once opened - approx. 90 minutes Unopened and stored in cool/dry/frost free environment – minimum of 6 months

  • Density: 1.07 g/cm³

  • Coverage rate: ~5m²

  • Temperature resistance: +70°C

  • Chemical properties: radon-gas-proof

Koster Deuxan 2C is always applied in two layers.

Koster Glass Fibre Mesh – glass silk fabric for reinforcing. The application of Koster Glass Fibre Mesh is predominantly necessary on areas which are exposed to pressurised water and which are in danger of cracking as well as on connections, transitions and fillets.