Our waterproofing system

Built the right way.
Protected the right way.

We work with a professional PU-hybrid build-up applied in defined layers. The result depends on three things: the right system for the project, correct surface preparation, and disciplined application including all details.

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System structure

Preparation first. Then a continuous, fiber-reinforced barrier.

Substrate preparation comes first, then a fiber-reinforced polyurethane-hybrid build-up. Fleece reinforcement is not required by the fiber-reinforced system — we use it as an additional layer of protection in our premium build-up.

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Proper waterproofing starts before the first coat.
Waterproofing a damaged substrate without treating the underlying cracks is not a proper long-term solution. Cracks move — they need to be treated before they are sealed. Just like a dentist treats the problem before sealing it, we treat and repair cracks before applying the waterproofing system.
Fiber-reinforced waterproofing already provides integrated reinforcement. At Cleanja Prestige, we can go one step further — adding a fleece reinforcement layer as an additional protection measure for selected premium applications.
Built for protection. Designed for longevity.
Build-up selected per project after substrate assessment.

Substrate assessment first

Substrate condition, moisture, compatibility and preparation must be assessed before any system is selected or applied.

No universal suitability

The system is not automatically suitable for every surface. Suitability is confirmed project by project.

Options on request

Fire-performance options depend on the selected system and product. An optional white reflective finish can be included.

System build-up

A complete liquid-applied waterproofing system — not just a coating.

The documented system variants follow a defined sequence. Each stage is confirmed project by project.

Substrate

Assessed for condition, moisture and compatibility

Primer / scraper

When required

Waterproofing membrane

Liquid-applied PU-hybrid

Reinforcement / fleece

Where required

Protective / top layer

Where specified

Specification

Technical data

Values are taken from the underlying technical assessment and laboratory documentation for the documented system variants.

System type

Liquid-applied 2K PU-hybrid waterproofing system

Minimum waterproofing layer

3.0 kg/m² for the documented standard system

3.7 kg/m² for the documented “+” system

Minimum layer thickness

2.1 mm for the documented standard system

2.0 mm for the documented “+” system

Working life

W3 — 25 years

Climatic zones

M and S — moderate and severe climate

Lowest surface temperature

TL4 — -30°C

Highest surface temperature

TH4 — +90°C

Water tightness

Passed

Wind resistance

≥ 50 kPa for tear-resistant substrates

Crack bridging

≥ 3 mm at ≥ 2 mm dry layer thickness

Water vapour diffusion resistance

Documented μ-values approximately 2155–2748 depending on system variant

Additional laboratory testing

Additional kerosene exposure testing

The system has undergone laboratory testing after exposure to kerosene vapour and liquid kerosene.

21 days

Kerosene exposure

2.0 g/m³

Kerosene mass concentration

For the documented vapour exposure condition

Tensile test comparison · discrete tested conditions

Normal conditions

1.44 MPa · 46.2%

Mean tensile strength 1.44 MPa · mean elongation at maximum tensile strength 46.2%

Kerosene vapour

1.29 MPa · 48.9%

Mean tensile strength 1.29 MPa · mean elongation at maximum tensile strength 48.9%

Liquid kerosene

1.13 MPa · 47.5%

Mean tensile strength 1.13 MPa · mean elongation at maximum tensile strength 47.5%

Bars represent the three discrete tested conditions only. No performance is implied for other concentrations, exposure periods or temperatures.

Documentation

Tested. Documented. Engineered.

We do not just sell waterproofing. We deliver a documented system, specialist application and professional site execution. The references below belong to the underlying system documentation — Cleanja Prestige is neither the issuing laboratory, the certification body nor the manufacturer of the underlying technology.

European Technical Assessment

ETA-22/0177

Reaction to fire classification

EN 13501-1

External fire performance

EN 13501-5

BROOF(t4)

Documented classification

Extended application testing

According to the applicable CEN/TS framework

Laboratory kerosene exposure testing

Vapour and liquid exposure

DIN EN ISO 527-1

Tensile testing

DIN EN ISO 2808

Dry film thickness testing

Request technical documentation

Technical performance is based on the underlying laboratory reports and European technical assessment documentation. Results apply to the tested systems, assemblies, products, application conditions and test parameters described in those documents. Project-specific engineering review, substrate assessment, authority requirements and manufacturer/application instructions remain applicable.

Two system configurations

One technology. Two build-ups.

Which configuration we specify depends on the project. Both are cold-applied PU-hybrid systems — the difference is how the reinforcement is achieved.

System 01

Fiber-reinforced PU-hybrid waterproofing

Fiber reinforced
No additional fleece required for the specified configuration
Minimum consumption: 3.7 kg/m²
Minimum dry film thickness: 2.0 mm
Crack bridging: ≥ 3 mm at 2 mm dry film thickness
Suitable for flat roofs, balconies and loggias

Build-up follows the manufacturer system reference. The final specification is confirmed after substrate assessment.

Variant B build-up

Technology explained

What is PU-hybrid waterproofing?

A liquid component and a powder component react together to form a seamless, crack-bridging waterproofing membrane — applied cold, without open flame.

Technical values are manufacturer / system information and relate to the tested configuration and stated test conditions.

Product characteristics · MB PUReactive+

Water vapour diffusion resistance: μ ≈ 2748
Density: approx. 1.4 kg/dm³
Consistency: free-flowing
Application rate: 3.7 kg/m²
Drying time: approx. 5 hours at the stated test conditions
Crack bridging: ≥ 3 mm at 2 mm dry layer thickness
Reaction to fire: Class B-s1,d0 according to the relevant EN classification in the manufacturer documentation
Roof classification: BROOF classifications depending on system build-up / tested configuration

Fire and roof classifications depend on the tested system build-up and substrate configuration — they are not universal for every roof.

PU-hybrid technology

The next generation of
roof regeneration.

MB PUEreactive+ / PU-hybrid waterproofing technology provides a liquid-applied solution for professional roof waterproofing and regeneration applications.

Where technically suitable and after proper substrate preparation, the system can be used over existing waterproofing substrates such as bitumen, PVC and EPDM where compatibility has been confirmed.

Regenerate

Work with a suitable existing waterproofing layer instead of removing it.

Protect

A continuous liquid-applied barrier including upstands and details.

Extend

Support the service life of the existing roof build-up where technically appropriate.

30 cmminimum height in the splash-water zone

Detail work

30 cm minimum protection
in the splash-water zone

Most roof problems do not start in the middle of the surface. They start at the details — where the roof meets a wall, a door threshold, an upstand or a drain.

Vertical extension
Waterproofing details should be properly extended up the vertical surface into the splash-water zone where the construction detail and project conditions require it.
Seamless transition
The horizontal and vertical areas are connected as one continuous layer, so splashing water has no open joint to travel through.
Assessed per project
The required height and detail solution depend on the specific construction detail and the applicable specification for the project — it is defined during inspection, not assumed.

White finishing system

White. Reflective.
Protective.

A white reflective finish can help reflect solar radiation and reduce heat absorption at the roof surface.

This can support thermal comfort and potentially reduce cooling demand, depending on the building, roof construction, climate and operating conditions.

Sun
Intense solar radiation on the roof surface.
Reflective white surface
A light, clean finish reflects part of the incoming radiation.
Less solar heat absorption
Lower surface heat build-up on the roof.

Bright white reflective coated rooftop in Dubai under strong sunlight with the city skyline behind

Fire performance

Engineered with fire
performance in mind.

Cold-applied waterproofing can provide an alternative to waterproofing applications involving open flames or high-temperature torch work.

Traditional hot work

Open flame & torch application

Gas torches or high-temperature hot-air equipment on the roof
Elevated fire risk near combustible build-ups and installations
Additional site protection measures required

Cold-applied system

Liquid-applied, no open flame

No open flame

Low application heat

Professional application

Tested performance

B-s1,d0

Reaction-to-fire classification

BROOF(t1–t4)

External fire performance of roofs

CLC/TR 50670

Technical reference for roof-mounted PV applications

Fire-performance classifications apply to the specific tested system and application conditions. Refer to the relevant technical documentation.

Regeneration

Roof regeneration.
Extend the life of your existing roof.

Existing waterproofing does not always need to be completely removed. Depending on the existing substrate and system requirements, MB PUReactive+ can be applied directly over suitably prepared existing waterproofing systems such as bitumen, PVC or FPO.

Existing waterproofing With regeneration

Proper preparation and assessment are essential. Substrate condition, moisture, adhesion and compatibility are checked before any regeneration is proposed.

Regeneration instead of full replacement

Extended service life of existing waterproofing

Efficient application

Reduced disruption to the building in use

Cold application — no open flame

Suitable for demanding renovation situations

01
Existing waterproofing
Bitumen, PVC, FPO or an ageing liquid system in place.
02
Wear & ageing
UV exposure, thermal movement and detail fatigue reduce performance.
03
Point of regeneration
Assessment, preparation and cold-applied PU-hybrid waterproofing on top.
04
Additional service life
A continuous new barrier protecting the existing build-up.

At a glance

Technical advantages

Cold application

No torch-based application.

Liquid-applied system

Seamless application where correctly specified and installed.

Reinforcement options

Fiber-reinforced material, with optional additional fleece reinforcement where specified.

Regeneration

Suitable existing systems can potentially be regenerated.

Fire performance

Tested characteristics according to technical documentation.

Reflective finish

White finishing systems can provide solar reflectance benefits.

Substrate categories

Where our system
can be applied

The following categories give an overview of surfaces that can generally be considered. Every surface still requires inspection and a compatibility assessment before application.