Product Data Sheet Safety Data Sheet Show all documents

SikaCor® PUR SW

1-pack, tar-free polyurethane coating for heavy-duty protection of steel

Highly abrasion resistant, 1-pack, tar-free polyurethane-coating, moisture curing. Low solvent content according to Protective Coatings Directive of German Paint Industry Association (VdL-RL 04).

  • Tough-hard, robust
  • Early exposure to water
  • Application at low temperatures and high relative air humidity
  • Suitable for cathodic protection systems
Product Data Sheet Safety Data Sheet Show all documents

Usage

For the protection of steel in contact with water, e.g. hydraulic steel structures, chemical industry, harbour and lock installations, etc. Especially suitable for refurbishment of old black coatings (e.g. coal tar pitch and tar epoxy resin coatings).  

Advantages

  • Tough-hard, robust
  • Early exposure to water
  • Application at low temperatures and high relative air humidity
  • Suitable for cathodic protection systems

Packaging

SikaCor® PUR SW15 kg net.
Sika® Thinner S25 l, 10 l and 3 l

Colour

Black, redbrown, approx. RAL 7032, approx. RAL 9002
Other colour shades upon request.

Slight colour deviations are possible due to raw material characteristics.


SikaCor® PUR SW tends to chalking and yellowing when frequently exposed to weathering.

In case of higher demands regarding colour retention, top coats with SikaCor® EG-4 or SikaCor® EG-5 are recommended.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

  • Tested and listed by the Federal Institution for Hydraulic Engineering (BAW).
  • Tested according to NORSOK M501, rev. 6, system No. 1.
Product Information

Shelf life

6 months

Storage conditions

In originally sealed containers in a cool and dry environment.

Density

SikaCor® PUR SW~1.4 kg/l
SikaCor® Zinc PUR~2.8 kg/l
SikaCor® PUR-1~1.6 kg/l

Solid content

ProductBy volume

By weight

SikaCor® PUR SW~72 %~80 %
SikaCor® Zinc PUR

~65 %

~89 %
SikaCor® PUR-1~58 %~78 %
Technical Information

Chemical resistance

Freshwater, brackish and salt water, neutral salts, mineral and fuel oils, fat oils, detergents etc.

Temperature resistance

Dry heat up to approx. + 100°C

Application

Application Information

Thinner

Sika® Thinner S
If necessary max. 5 % Sika® Thinner S may be added to adapt the viscosity.

Attention! To ensure complete curing, only the recommended Thinner must be used exclusively! Other Thinners may lead to curing defects.

Material temperature

Min. + 5°C

Relative air humidity

Min. 30 %, max. 98 %, surface temperature shall be at least 3 K above dew point.

The surface must be dry and free from ice.

Surface temperature

Min. + 0°C

Waiting time to overcoating

Min. 4 hours
Max. 6 months

Drying time

Final drying time
Depending on layer thickness, air humidity and temperature final hardness is achieved within 1 week.
Consumption

Consumption

Theoretical material-consumption / coverage without loss for medium dry film thickness of


Product		SikaCor®
PUR SW		SikaCor®
Zinc PUR		SikaCor®
PUR-1

Dry (DFT)

200 μm80 μm80 μm
Wet (WFT)280 μm

125 μm

140 μm
Consumption~0.390 kg/m2~0.345 kg/m2~0.220 kg/m2
Coverage~2.55 m2/kg~2.90 m2/kg~4.55 m2/kg

Apart from small areas dry film thicknesses of 150 μm SikaCor® Zinc PUR, 180 μm SikaCor® PUR-1 and 400 μm SikaCor® PUR SW per layer should not be exceeded.
Application steps

SURFACE PREPARATION

Steel:
Blast cleaning to Sa 2 ½ according to ISO 12944-4.
Free from dirt, oil and grease

Old coatings:
In case of well adhering old coatings only thorough cleaning is sufficient. If necessary the adhesion of the maintenance coat may be increased by sweep blasting of the old coating. Remove loose particles. In case of exposure to submersion, condensation and splash water damaged areas must be derusted to PSa 2 ½. In case of exposure to weathering surface preparation to PSt 3. Application of a trial area is strongly recommended.

MIXING

SikaCor® PUR SW is supplied ready for use. Prior to application stir thoroughly. Addition of Thinner decreases sag resistance and reduces the dry film thickness. Opened units must be used within one day.

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 and roller

Conventional high pressure spraying:

  • Nozzle size 1.7 - 2.5 mm
  • Pressure 3 - 4 bar


Airless-spraying:

  • Pressure min. 180 bar
  • Diameter of hoses min. 10 mm (⅜ inch)
  • Nozzle size 0.45 - 0.66 mm (0.017 - 0.027 inch)
  • Spraying angle 50° - 80°

CLEANING OF EQUIPMENT

Sika® Thinner S

Documents