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Liquid Roofing membrane - Koster MS Flex

Verified by manufacturer 6 months ago

Koster Aquatecnic Ltd Third party certifications:

  • ISO 9001 Quality Management

    Certificate type

Fast-curing, single-component and highly elastic polyurethane roof waterproofing system, environmentally friendly and completely UV stable. The perfect material for balcony and terrace waterproofing.

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Application

KÖSTER MS-Flex is a waterproofing material for the positive side waterproofing for different situations. Due to its excellent adhesion to most substrates (including masonry, concrete, screed, PVC, PP, PE, FRP, plastics, and metal) and high elasticity, it is an excellent repair material as well as a complete waterproofing coat for large areas.

  • Waterproofing of exposed flat roofs.
  • Waterproofing of exposed terraces.
  • Waterproofing of wet and damp rooms under tiles (e.g. kitchens, bathrooms, garages).
  • Waterproofing of balconies and terraces under tiles.
  • Lining of box gutters.


Description

Koster MS Flex is a fast-curing single-component liquid waterproofing membrane which is installed in two coats with a Koster Superfleece reinforcement in between the cured layers.

Based on MS Polymer technology, the Koster MS Flex is suitable for both new and refurbishment waterproofing former a crack bridging.


Features and benefits:

  • Single component, ready to use and very user friendly.
  • Seamless waterproofing.
  • Thixotropic, can be applied well to both vertical and horizontal surfaces.
  • Excellent adhesion to many substrates including - masonry, concrete, PVC, TPO, plastics, metal, etc.
  • Environmentally friendly - solvent and isocyanate free.
  • Working temperature range of -30ºC to +80ºC.
  • Compatible with bitumen.
  • Resistant to oils, seawater, detergents, salts and frost.
  • Excellent weather and UV stability.
  • Quick installation times offering cost savings.
  • Avoiding inherent risks associated with hot works.
  • Easy to maintain.
  • Minimal on-site disruption.


For further information or design assistance, please contact Technical@kosteruk.com and we will be happy to assist.

General information

Color

Grey

Finish

Smooth

Material

Polyurethane

Shape

Formless

Length

Bespoke

Width

Bespoke

Height

Bespoke

Warranty description

Ten year

Uniclass

Pr_35_31_68_64 Polyurethane (PUR) waterproof coatingsPrimary

CAWS

J30/110 Cold-applied tanking

J31/5 Cold deck roof coating

J31/110 Cold deck roof coating

J31/353 Waterproof coating

Product range

Roofing Systems

Specification data - Polyurethane (PUR) waterproof coatings

Third-party certification

CE Marking ; MPA Braunschweig; ERA Classification of Reaction to Fire; Tested and approved against root penetration; product Declaration of Performance.

Guidance for specification option:

Certificates:

  • CE Marking acc. EN 1504-2: 2008-04 Products and systems for the protection and repair of concrete structures. 
  • MPA Braunschweig, Fire Behavior acc. DIN EN ISO 11925-2:2011-02.
  • Accelerated cyclical weathering acc. ASTM G154.
  • ERA Classification of Reaction to Fire in acc. EN 135011:2007+A1:2009
  • MPA Braunschweig, Usability of the liquid polymer for waterproofing in contact with soil against water pressure. 
  • MPA Braunschweig, Usability of the liquid polymer for waterproofing construction elements.
  • Tested and approved against root penetration.
  • Product Declaration of Performance.

Colour

Grey.

Package

8 kg.

25 kg.

Manufacturer guidance

Metal container: 

Volatile organic compounds (VOC) content

572 g/L, 57%.

Guidance for specification option:

Non-volatile content: 43%.

Flash point

26ºC.

Density

0.99 g/cm³ (20ºC).

Guidance for specification option:

Final product: 1.3 g/cm³.

Viscosity at 20°C

s62, 100 rpm: 5 mPa·s.

Manufacturer guidance

 Approximate, (Brookfield):

Storage

Keep at a temperature between 35ºC, away from ignition sources and moisture.

Guidance for specification option:

Use before: 12 months after manufacturing date.

Hardness

65-70 A (ISO 868).

Manufacturer guidance

(shore):

Tear strength

14 N/mm.

Guidance for specification option:

(ISO 34-1, Method B.)

Water vapour permeability

μ>1000, 20 g/m² per day.

Guidance for specification option:

(EN1931.)

Abrasion resistance

14.3 mg.

Guidance for specification option:

(Taber, 1000 cycles, CS-10, UNE 48250.)

Adhesion

Concrete: 2.0 MPa, Ceramics: 2.6 MPa, Polyurethane foam: 1.4 MPa.

UV resistance

Manufacturer's standard.

Guidance for specification option:

Product includes anti UV additives. A colour change is expected due to its aromatic polyurethane composition. This discolouration does not affect its properties.

Thermal resistance

Stable up to 120ºC.

Tensile strength (to EN ISO 527)

4.1 MPa.

Elongation

617%.

Sustainability data

Contains Red List materials

No

Country of material origin

Germany

Country of product manufacture

Germany

Recyclability

Yes

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

0 %

Third party certifications

ISO 9001 Quality Management

ISO 9001 Quality Management

Koster Bauchemie AG - ISO 9001 Certificate

Literature

Koster MS Flex Foil

Koster MS Flex Foil

Koster Waterproofing Systems Company Brochure

Koster Waterproofing Systems Company Brochure

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