Elastomeric Cementitious Modified Flexible Coating (EN1504-2, WRAS)

Overview

Cemprotec ElasticCemprotec Elastic is an elastomeric, cementitious modified, polymer-rich coating which maintains its flexibility under permanent immersion and when exposed externally. It is ideally suited for waterproofing and protecting concrete and masonry structures which exhibit cracking and where further movement is expected.

When mixed Cemprotec Elastic exhibits a good degree of thixotropy to enable ease of application by brush or spray techniques to give an even finish with no sagging, even in vertical situations. It hydrates to form a durable, highly alkaline, permanently elastomeric coating which not only protects the concrete or other substrates from water penetration and carbon dioxide diffusion, but also accommodates movement in cracks. It is non-hazardous and ideally suited for application in confined spaces.

Typical applications include the sealing of water tanks, waterproofing of exposed, buried or green roofs, and use as a crack isolation membrane on concrete floors or screeds. It can be reinforced with Cemprotec Geo80 over generally cracked substrates or Cemprotec 2000-S to treat formed joints and dominant cracks.

Advantages

  • 2mm = 135mm concretePre-packaged material only requiring mixing on site.
  • Brush, trowel or spray applied, normally in two coats. Flooring applications are a one coat operation.
  • Tough, flexible coating which maintains its elastomeric properties even under immersed conditions to accommodate movement in cracks.
  • Good abrasion and very high resistance to freeze/thaw cycles and de-icing salts.
  • Excellent adhesion to sound prepared concrete and masonry substrates as well as steel.
  • Dense matrix offers low permeability to water, even at 10 bar pressure, and very high diffusion resistance to carbon dioxide gas.
  • Suitable for Damp SubstratesA 2mm coat provides the equivalent to 135mm of good quality concrete cover.
  • Can be applied to damp substrates in temperatures down to 5°C.
  • Water-based product, free from hazardous solvents, ideal for use in confined spaces. Non-toxic when cured.
  • Barrier to root penetration making it suitable for green roof applications.

Compliance

Sustainable CoatingsCE marked in accordance with BS EN 1504 Part 2. WRAS Approved for use in contact with potable water.

Specification Clause (Structural Waterproofing)

The structural waterproofing coating shall be a two component, thixotropic, polymer modified cementitious coating. It shall be CE marked in accordance with BS EN 1504-2, and shall comply with the following performance specification:

  • Elongation of at least 120% in ambient conditions and 70% immersed (2.0mm film cured for 28 days)
  • Impermeable to water under 10 bar hydrostatic pressure such that a 2.0mm coating is equivalent to 2,270mm of concrete
  • Oxygen diffusion resistance coefficient of at least 1.706 x 10-5 cm2/s in accordance with BS EN 1062-6.

Specification Clause (Roofing)

The roof coating shall be a two component, thixotropic, polymer modified cementitious coating. It shall be CE marked in accordance with BS EN 1504-2, and shall comply with the following performance specification:

  • Impermeable to water under 10 bar hydrostatic pressure such that a 2.0mm coating is equivalent to 2270mm of concrete
  • Elongation of at least 120% in ambient conditions and 70% immersed (2.0mm film cured for 28 days)
  • Tensile strength of at least 0.5 MPa in ambient conditions and 0.4 MPa immersed (2.0mm film cured for 28 days)
  • Barrier to root penetration in accordance with Lupin Root Resistance Test TS 14416: 2005.

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Uses Application Method Application Thickness Performance Pack Yield

Waterproofing and protection of concrete where further movement is expected. Available in grey & white.

  • Brush
  • Float
  • Notched trowel
  • Skid leveller
  • Spray

2 x 1mm

28 days 8-10 Mpa

  • 9.4 litres per 15kg
  • 4.7m²/15kg @ 2mm
  • 18.8 litres per 30kg
  • 9.4m²/30kg @ 2mm
  • Density: 1600kg/m³

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