Product Data Sheet Safety Data Sheet Show all documents
Sikagard®-545 W Elastofill

Sikagard®-545 W Elastofill

Acrylic crack-bridging intermediate protective coating for concrete

Sikagard®-545 W Elastofill is a 1-part, acrylic, water-based, crack-bridging, intermediate surface protection coating for concrete. It fills surface pores, cavities and blowholes or provides a smooth or textured levelling layer for subsequent protection coating topcoats. Sikagard-545W Elastofill is part of the Sikagard crack-bridging, anti-carbonation, surface protection coating system for concrete and complies with the requirements of EN 1504-2.

  • Water dilutable
  • Easy to apply compared to cementitious levelling coats
  • Smooth filling of pores, small cavities and blowholes
  • Good diffusion resistance against CO2 reducing the rate of carbonation
  • Good water vapour permeability
  • Crack-bridging at low temperatures (-20°C)
  • Retains board mark texture/formwork patterns on finished surface
  • Resistant to freeze/thaw and de-icing salts
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Product Data Sheet Safety Data Sheet Show all documents

Usage

  • Crack-bridging intermediate coat beneath Sikagard®-550 W Elastic top coat
  • Filling pores, cavities and blowholes
  • Levelling / re-profiling layer
Suitable for:
  • Protection against ingress (Principle 1, method 1.3 of EN 1504-9),
  • Moisture control (Principle 2, method 2.3 of EN 1504-9)
  • Increasing the resistivity (Principle 8, method 8.3 of EN 1504-9)
 

Advantages

  • Water dilutable
  • Easy to apply compared to cementitious levelling coats
  • Smooth filling of pores, small cavities and blowholes
  • Good diffusion resistance against CO2 reducing the rate of carbonation
  • Good water vapour permeability
  • Crack-bridging at low temperatures (-20°C)
  • Retains board mark texture/formwork patterns on finished surface
  • Resistant to freeze/thaw and de-icing salts

Packaging

15 L containers

Refer to current price list for packaging variations

Colour

Light grey thixotropic paste

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating
  • Surface protection system OS-DII ZTV-SIB 90, Sika MonoTop®-620, Sikagard®-545 W Elastofill / -550 W Elastic, Institut für Bauforschung Germany, Test report No. A 2714/D2/V12
Product Information

Chemical Base

Water-based acrylate

Shelf Life

12 months from date of production

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Density

~1,24 kg/l (at +20 °C)

Solid content by volume

~62 %
System information

System Structure

Sikagard® crack-bridging system:

Coating

Product

Number of coats

Primer (water-based)

Sikagard®-552 W Aquaprimer

1

Primer (solvent-based)

Sikagard®-551 S Elastic Primer

1

Intermediate coat

Sikagard®-545 W Elastofill

1–2*

Top coat

Sikagard®-550 W Elastic

2**

* Number of coats depend on technical requirements, substrate condition or application (e.g. overhead application, high crack bridging requirement, etc.).

** For light colours on a dark substrate, more than 2 coats maybe required.
Technical Information

Tensile adhesion strength

1,0 N/mm2

(EN 1542)

For concrete with a tensile adhesion strength <1 N/mm2 use Sikagard®-551 S Elastic Primer before applying Sikagard®-545 W Elastofill

Crack Bridging Ability

Class A3 (–20 °C)

(EN 1062-7)

Freeze Thaw De-Icing Salt Resistance

0,8 (0,7) N/mm2

(EN 13687-part 1 & part 2)

Behaviour after Artificial Weathering

Pass after 2000 hours

(EN 1062-11)

Diffusion Resistance to Water Vapour

Dry film thickness

d = 600 µm

Diffusion coefficient H2OµH2O = 1,1 × 103

Equivalent air layer thickness

SD, H2O = 0,65 m

Requirements for breathabilitySD, H2O ≤ 5 m

Capillary Absorption

w = 0,02 kg/(m2h0,5)

(EN 1062-3)

Carbonation Resistance

Dry film thickness

d = 690 µm

Diffusion coefficient CO2µCO2 = 1,2 × 105

Equivalent air layer thickness

SD, CO2 = 83 m

Requirements for breathabilitySD, CO2 ≥ 50 m

Application

Application Information

Layer Thickness

Dependant on technical requirements, substrate condition or application

Ambient Air Temperature

+8 °C min. / +30 °C max.

Relative Air Humidity

≤ 80 %

Dew Point

Substrate and ambient temperature must be at least +3 °C above dew point

Substrate Temperature

+8 °C min. / +30 °C max.

Waiting Time / Overcoating

Waiting time between coats at +20 °C substrate temperature:

Coating

Minimum

Next Coating

Sikagard®-552 W Aquaprimer

~5 hours

Sikagard®-545 W Elastofill

Sikagard®-551 S Elastic Primer

~18 hours

Sikagard®-545 W Elastofill

Sikagard®-545 W Elastofill

~12 hours

Sikagard®-545 W Elastofill

Sikagard®-545 W Elastofill

~10 hours

Sikagard®-550 W Elastic

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Curing Treatment

Sikagard®-545 W Elastofill does not require any special curing but must be protected from rain for at least 6 hours at +20 °C.

Applied Product Ready for Use

Full cure: ~7 days at +20 °C
Consumption

Consumption

Product

Per Coat (kg/m2)

Sikagard®-552 W Aquaprimer

~0,10–0,15

Sikagard®-551 S Elastic Primer

~0,10–0,15

Sikagard®-545 W Elastofill

~0,80–1,10

Sikagard®-550 W Elastic

~0,25–0,35

These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
Application steps

APPLICATION

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

Primer coat
After application and curing of any levelling/smoothing coat /pore filler, apply by brush or roller, 1 coat of the appropriate primer at the required consumption rate, to all the surfaces requiring the Sikagard®-545 W Elastofill coating.

Intermediate coat

Sikagard®-545 W Elastofill is supplied ready for use. Before application, mix for 2 minutes using a low speed electric single paddle mixer or other suitable equipment. Mix the liquid and all the coloured pigment until a uniform colour has been achieved.

After application and waiting time of the primer, apply evenly by brush, mechanical spray (screw type pump) or suitable trowel, 1-2 coats of Sikagard®-545 W Elastofill to achieve the required total dry film thickness. 

If a decorative surface texture is to be maintained, application must be carried out following the same direction of the texture profile.

Texturing the surface
Apply the intermediate coat as described in previous section and allow to dry.
The final textured surface can be achieved by applying another coating application with the addition of 2-3% water added to Sikagard®-545 W Elastofill using short-piled rollers. Consumption depends on surface texture required.

To achieve a board mark finish, instead of using rollers, use a timber board to make an imprint of the grain in the coating.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.

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