Product Data Sheet Show all documents

SikaCor® Zinc R

Low-solvent Epoxy zinc-rich primer for steel

2-pack, highly pigmented zinc-rich primer of low solvent content, based on epoxy resin. Suitable for use in hot and tropical climatic conditions.

  • Excellent corrosion protection
  • Mechanically extraordinary resistant
  • Extremely high water and condensation water resistance
  • Fast drying and curing characteristics
Product Data Sheet Show all documents

Usage

Robust corrosion protection primer for steel offering a wide range of applications. Mainly for bridges, pipe lines, containers, industrial and harbour installations, sewage treatment plants and large machinery; submerged or non-submerged in industrial or marine environments. Particularly suited for workshop application as heavy duty transportable coating. In a dry film thickness of 20 μm SikaCor® Zinc R can also be employed as welding primer. Test report is available upon request.  

Advantages

  • Excellent corrosion protection
  • Mechanically extraordinary resistant
  • Extremely high water and condensation water resistance
  • Fast drying and curing characteristics

Packaging

SikaCor® Zinc R26 kg, 15 kg and 7 kg net.

Colour

Zinc grey

Tinted red

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

  • Approved according to German standard ‘TL/TP-KOR-Stahlbauten’, page 87.
Product Information

Shelf life

Minimum 1 year from date of production

Storage conditions

In original sealed containers in a cool and dry environment.

Density

~2.8 kg/l

Solid content

~67 % by volume

~89 % by weight
Technical Information

Chemical Resistance

The fully cured material is resistant to weathering, water and mechanical wear.

Temperature Resistance

Dry heat up to approximately +150 °C, short term up to maximum +180 °C.
Damp heat up to approximately +50 °C.

Application

Application Information

Mixing Ratio

Components A : B

By weight

94 : 6

By volume4.4 : 1

Thinner

Sika® Thinner K
If necessary maximum 3 % Sika® Thinner K may be added to adapt the viscosity.
In case of using as weldable shop primer add ~12 % b.w. Sika® Thinner K.

Product Temperature

+5 °C min. / + 35 °C max.

Relative Air Humidity

Maximum 85 %, except the surface temperature is significantly higher than the dew point temperature, it shall be at least 3 °C above dew point.

Surface Temperature

+5 °C min. / +35° C max.

Pot Life

+10 °C~12 h
+20 °C~8 h
+30 °C~5 h

Drying Stage 6


DFT 20 μm

DFT 80 μm

+5 °C 1 h3 h
+10 °C

1 h

2.5 h
+20 °C 45 min2 h
+40 °C 30 min1.5 h
+80 °C 20 min45 min

Waiting Time / Overcoating

Between SikaCor® Zinc R, SikaCor® EG-1 and SikaCor® EG-1 VHS:
Minimum waiting time until drying stage 6 is achieved to maximum 4 years.
In case of longer waiting time please contact Sika Technical Department.

Between SikaCor® Zinc R and other top coats:
Minimum until drying stage 6 is achieved to maximum depending on top coat.

In case of intermediate storage possible contamination must be removed before further coats may be applied.

Drying time

Final drying time

Depending on film thickness and temperature full hardness is achieved after 1 - 2 days.
If used as primer for a coating system with top coats the final drying time depend on them and the full hardness is usually achieved after 1 - 2 weeks, depending on film thickness and ambient temperature. Tests of the completed system should only be carried out after final drying.
Consumption

Consumption

Theoretical material-consumption / VOC without loss for medium dry film thickness:

Dry film thickness

60 μm80 μm*
Wet film thickness90 μm120 μm
Consumption

~0.250 kg/m2

~0.335 kg/m2
VOC~27.6 g/m2~36.8 g/m2

* for spray application

Apart from small areas the dry film thickness of SikaCor® Zinc R should not exceed 150 μm per layer.
The dry film thickness of the primer coat does not respect the correction factors on rough surfaces according to ISO 19840.
Application steps

SURFACE PREPARATION

Steel:

Blast-cleaning to Sa 2 ½ according to ISO 12944, part 4.

Free from dirt, oil and grease.

MIXING

Stir component A very thoroughly using an electric mixer (start slowly, then increase up to approximately 300 rpm). Add component B carefully and mix both components very thoroughly (including sides and bottom of the container). Mix for at least 3 minutes until a homogeneous mixture is achieved. Fill mixed material into clean container and mix again shortly as described above.

APPLICATION

The method of application has a major effect on achieving uniform thickness and appearance. Spray application will give the best results. The indicated dry film thickness is easily achieved by airless spray. Adding solvents reduces the sag resistance and the dry film thickness. In case of application by roller or brush, additional applications may become necessary to achieve the required coating thickness, depending on type of construction, site conditions, colour shade etc. Prior to major coating operations a test application on site may be useful to ensure the selected application method will provide the requested results.

By brush

Conventional high pressure spraying:

  • Nozzle size 1.7 - 2.5 mm
  • Pressure 3 - 4 bar
  • Oil and water trap is compulsory

 

Airless-spraying:

  • Pressure minimum 180 bar
  • Nozzle size 0.38 - 0.53 mm (0.015 - 0.021 inch)
  • Spraying angle 40° - 80°

 

CLEANING OF EQUIPMENT

SikaCor® Cleaner

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