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Koster Flooring Systems KOSTER EM-VS

Koster EM-VS is a universally applicable, water based, scratch-resistant epoxy resin sealant with very high covering power. It bonds very well to all cementitious substrates.

Product Type: 2K (2 component) Sealant, Reactive Sealant

Compatible Substrates & Surfaces: Concrete

Chemical Family: Epoxy & Epoxy Derivatives

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Features
  • This product is a water based, scratch resistant epoxy resin sealant with very high covering power.
  • It bonds very well to all mineral substrates.
  • It is resistant to medium mechanical stresses and to short term chemical stresses caused by contact with diluted acids, alkalis and salt solutions.
  • The material is not suited for permanent exposure to water.

Applications & Uses

Compatible Substrates & Surfaces
Application of Next Layer
  • 12°C: min. 24 - 48 hour
  • 23°C: min. 12 - 24 hour
  • 30°C: min. 12 - 24 hour
Coverage

0.2 - 0.3 kg/sq.m. per coat (two coats are recommended)

Fields of Application
  • This product can be used to seal and paint floor and wall surfaces made of concrete, cementitious screeds, and plasters in indoor areas such as shops, garages, etc.
  • Exterior use is only allowed in conjunction with the KÖSTER BTG System.
  • In the BTG System a maximum consumption of 200 - 300 g / m² is applied to the substrate and immediately broadcast to rejection with KÖSTER Color Chips (consumption approximately 300 g / m²).
  • This cured layer is subsequently coated with KÖSTER TS transparent (consumption 0.15 - 0.2 kg / m²).
  • For further details please see the technical system specifications for the KÖSTER BTG System.
Substrate
  • The substrate to be sealed must be sound and solid, free of dust, oil and grease as well as other bond inhibiting contaminants. Weak and/or contaminated substrates have to be removed down to a clean, sound and solid layer by scarifying, sandblasting or shot blasting.
  • Rough substrates (e. g. due to scarifying grooves) are leveled using KÖSTER LF-BM mixed with silica sand (1:4).
  • KÖSTER EM-VS can then be applied after approx. 12 hours.
  • The minimum adhesive tensile strength of the substrate must be 1.5 N / mm² and the residual moisture content of concrete must not exceed 4% by weight.
  • Where moisture from the substrate or a high pH is expected, KÖSTER VAP 2000 should be installed according to the Technical Datasheet.
Application

Mixing:

  • The components should have a temperature of between + 15 °C and + 25 °C before mixing.
  • They are mixed intensively using a mechanical stirring device (under 400 rpm) until a homogeneous consistency is reached.
  • To avoid mixing failures re-pot the material and mix again.
  • Total mixing time is 2 minutes. In order to adjust the processing consistency, 0.4 - 1.2 l of water can be added to the material and mixed in thoroughly.
  • When processing multiple units of KÖSTER EMVS, be sure to use exact amounts of water.
  • Differences in water amounts will affect the coloration of the material.

Spreading:

  • Immediately after mixing the KÖSTER EM-VS is spread evenly onto the substrate using a rubber squeegee and then thoroughly rolled using a short napped roller.
  • Be sure that the material does not puddle, for example by flowing into or collecting in surface depressions.
  • Overlapping of coats should be kept to a minimum.
  • Where scheduling or details cause an interruption to the coating work, the coated area should be masked with tape and the tape removed after a gelling time of approx. 1 hour.
  • In this manner a clean seam is achieved.
  • If a rough or anti-slip surface is required, the addition of approx. 30% kiln dried silica sand or a light sanding with kiln dried silica sand, for example with a grading fraction of 0.1 - 0.4 mm, is recommended.
  • This will raise the material consumption.
Consumption
  • As interior coating: approx. 0.2 - 0.3 kg / m² per work step.
  • Two coats are recommended.
  • In the KÖSTER BTG System: 200 to 300 g / m² in one work step.
Cleaning
  • Clean tools immediately after use with KÖSTER Universal Cleaner.
  • Hardened material is removed mechanically.
Other
  • Liquid polymers react to temperature fluctuations by changing their viscosity and/or curing behavior.
  • Application should only be carried out during falling or constant temperatures.
  • Low temperatures will slow the reaction; high temperatures and mixing large volumes will increase the reaction rate.
  • Protect the coating form moisture of all kinds during application and curing.

Properties

Color
Component A
ValueUnitsTest Method / Conditions
Mix Ratio by Weight4.0--
Component B
ValueUnitsTest Method / Conditions
Mix Ratio by Weight1.0--
Typical Properties
ValueUnitsTest Method / Conditions
Density (23°C)1.35g/cm³-
ViscosityThixotropic--
Foot Trafficable (12°C)approx. 48hours-
Foot Trafficable (23°C)approx. 24hours-
Foot Trafficable (30°C)approx. 16hours-
Full Cure (12°C)approx. 10days-
Full Cure (23°C)approx. 7days-
Full Cure (30°C)approx. 5days-
Substrate Temperature12 - 30°C-
Maximum Relative Humidity (12°C)max. 75%-
Maximum Relative Humidity (23°C)max. 80%-
Temperature Difference to Dew Pointmin. 3°C-
Material temperature15 - 25°C-

Safety & Health

Safety
  • Avoid inhaling the fumes and skin contact.
  • Wear protective clothing, gloves and goggles during processing and application of the material.
  • Make sure the room is well ventilated.
  • In case of skin contact, wash off the material immediately with lots of soap and water. In case of eye contact, flush eyes immediately and thoroughly with water or preferably an emergency eye wash bottle.
  • Consult a physician.
  • During processing and application of the material, do not eat, smoke, or handle open flames.
  • The warnings and safety recommendations on the packaging and on the Material Safety Data Sheet and the regulations of relevant professional organizations must be observed and obeyed.

Packaging & Availability

Packaging

CT 210 008 - 8kg combi-package

Storage & Handling

Pot Life
  • 12°C: approx. 90 minutes
  • 23°C: approx. 45 minutes
  • 30°C: approx. 30 minutes
Storage
  • In originally sealed packages at temperatures between 15 - 25 °C , the material can be stored for a minimum of 12 months. .
  • Store the material cool but frost free.