KÖSTER Deuxan 2C 32kg

In stock
£139.50 Ex VAT
£167.40 Inc VAT

Bitumen based, crack-bridging sealant for the external waterproofing of building structures.

Bitumen Waterproof Sealant

KÖSTER Deuxan 2C is a robust two component bitumen thick film sealant for the external waterproofing of building structures. The polymer-modified coating bridges cracks in the substrate securing it against hydrostatic water pressure.

Uses of Deuxan 2C 

This professional external waterproofing product is designed for the permanent exterior waterproofing of the following: 

  • basement walls
  • foundations
  • floor plates

The waterproof coating is also suitable for intermediate waterproofing underneath screeds and for bonding insulation and drainage as well as balconies, terraces (without inhabited sub-structures) and wet and damp rooms. 

How to Use Deuxan 2C  

Ensure that you have a clean substrate that is dry or slightly damp. Prime the structure with Polysil TG 500 by spray application. Next you should fill any irregularities of 5mm or less with a scraped layer of KÖSTER Deuxan 2C to protect your waterproofing layers. If they are deeper than 5mm use Repair Mortar mixed with a bonding emulsion.

You need to apply the waterproof coating in two layers. Each layer has to be free of flaws, even, and in the required thickness.

It is important to protect this waterproof layer before backfilling to avoid mechanical damage. An external waterproofing membrane such as GeoDrain can be used to provide protection.


Return to external waterproofing to browse more products. 



  • Secure external waterproofing against pressurised & non-pressurised water
  • Water tightness
& crack-bridging ability
  • Bending properties at low temperatures
& stability at high temperatures
  • Reaction to fire
  • Good compressive strength & durability
  • Polystyrene-free & radon-proof
More Information
Model W 252 032
Manufacturer Delta Membranes
Packaging Individual unit
Size 32 Kg Two component unit
Dillution Two components mixed as per data sheet
Coverage see data sheet
Colour Black
Country of Manufacture Germany

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