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Estoflex MS600

Flexible Bitumen – Rubber Membrane

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Estoflex MS600

High Performance, Methoxysilane Based Liquid Applied Waterproofing membrane


Estoflex MS600 is a single component, functionalized polyether backbone with methoxysilane polymer waterproofing coating. It provides excellent performance in weatherability, heat resistance and chemical resistance.


To provide a better water and vapour proof in complicating application surface compare to membrane type and ensure better integrity between applied surfaces and waterproofing coating. Areas of application:

  • Reinforced Concrete Roofs
  • Metal Roof
  • Waterproofing of terraces and balconies
  • Roofing tiles


  • Environmental-friendly (can be applied indoor and outdoor)
  • Stable under UV Exposure – No top coat required
  • When fully cured, it forms a tough and flexible membrane, hence eliminating the need for a reinforcing layer.
  • Able to withstand human traffic
  • Heat Dissipation Ability between 2-3 °C
  • Crack bridging capabilities up to 1mm
  • Odorless

Application Instruction

Surface Preparation

STEEL SURFACE: The steel surface must be dry, dry and free of all contaminants. Old coatings, rust, waxes, oils, etc. must be removed by mechanical methods, wire brushing, or abrasive blasting to SA 2 1/2. All blasted surfaces must be coated immediately or before visible rust occurs.

NEW CONCRETE: The surface must be firm, dry, clean,  free of dirt, oil, grease, and all other foreign matter. The new concrete must age at least 28 days before coating. Mechanical methods such as scarifying, water jet cleaning, grinding, etc. should be carried out to remove the weak layer of surface laitance

EXISTING CONCRETE: The surface must be structurally sound, dry and free of all contaminants. Weak or contaminated concrete must be removed until sound concrete is realized. Old coatings, toppings, waxes, oils, etc. must be removed by mechanical methods as mentioned in New Concrete.


Estoprime LV is recommended to be applied as a primerbefore application of Estoflex MS600 to ensure good bond strength.


Physical Properties

Appearance Liquid
Standard Colour Grey
Solid Content, % > 95
Elongation at Break, % ASTM D412 >400
Tensile Strength, N/mm2 ASTM D412 > 2.5
Water Absorption, % BS1881:Part 122 < 0.1
Adhesion to concrete at 25oC, N/mm2 ASTM D4541 > 1.2
UV Accelerated Weathering 1000 hrs exposure


No cracking, chalking, blistering or peeling decay and delamination
Cure Time, hrs 12 – 24
Touch Dry at 25oC, hrs 4 – 8
Recommended thickness (WFT) 1.5 ± 0.2 mm at 2 coats



Pre-mix the material with slow speed mechanical stirrer for  at least 1 minute.

Apply the first neat coat of Estoflex MS600 on the prepared substrate surface with squeegee, roller or by spray method. Leave it to cure for 4 hours in between each coat. Recommended thickness is 1.5 mm in minimum 2 coats.

No dilution is allowed.


The applicator should also take precautions to protect the Estoflex MS600 membrane from any mechanical damage during the construction of other works to be carried out directly on the Estoflex MS600 membrane.


Packing & Size

Estoflex MS600 20 kg/pail
Estoprime LV 5L pack



Estoflex MS600 1.7kg/ m2  / 2 coat

Depend    on    porosity                  of substrate

Estoprime LV 4 – 6 m2  per liter

Depend    on    porosity    of




Estoflex MS600 should be stored below 30°C out of direct sunlight and rain. All containers should remain sealed until ready to use.

Shelf life for this product is up to one year in unopened container and stored in a cool and dry place

Health and Safety

Proper PPE especially safety mask are to be worn during application. In case of eye splashes or excessive skin contact, wash thoroughly with clean water. If ill effects occur, seek medical attention immediately.

Technical Support

Estop offers a comprehensive technical support, including help at the design stage, application advice and on the site problem solving. Specifiers and contractors are encouraged to contact our trained staff for answers to their questions.

Additional Information

Estop manufactures and offers a wide range of complementary products which includes waterstops, waterproofing products, grouts, anchors, specialized flooring products. In addition, a wide range of products formulated for repair and refurbishment of spalled concrete are available.