Duoflex Structural Waterproofing System

Duoflex Structural Waterproofing System

Soprema UK Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Liquid applied, modified bitumen waterproofing system.

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A liquid applied, modified bitumen waterproofing system which forms a strong, durable, flexible, lightweight and self healing monolithic barrier to the transmission of water and vapour. It is designed to last the lifetime of the structure to which it is applied.

Duoflex is designed to retain its durability and elasticity and continue to absorb repeated movements and stress in the structure it is protecting.

Duoflex is an environmentally friendly formulation of polymer modified bitumen, synthetic rubbers and reinforcements with minimal environmental impact.


Duoflex can be applied in temperatures as low as -15°C. While in use, it does not release any toxic gases or harmful mutagens, neither does it contain any VOCs (Volatile Organic Compounds). Duoflex requires no curing or on site mixing.

General information

Uniclass 2015

Pr_35_31_68_17 Cold-applied polymer-modified bitumen waterproof coatingsPrimary


J31/10 Warm deck roof coating

J31/110 Cold deck roof coating

J31/120 Warm deck roof coating

J31/130 Inverted roof coating

J31/353 Waterproof coating

J31/5 Cold deck roof coating

Specification data - Cold-applied polymer-modified bitumen waterproof coatings

Product Reference

Duoflex Structural Waterproofing System


Elastocol 500


Two coats of Duoflex



Standard product features


– Elastocol 500:

High bond, high penetration primer blended with elastomeric, polymer modified SBS compound.

Spray or roller applied.


– Duoflex:

Hot melt, rubberized monolithic bitumen polymer, modified with SBS thermoplastic resin.


– TR200:

Spun bound polyester reinforcement carrier, which is embedded into the first coat of Duoflex.

Third party certifications

  • Certificate: 10/4745 : DUOFLEX Structural Waterproofing: DUOFLEX waterproofing system