Sika® Unitherm®-120 Steel W New

• Complies with French VOC (A+), even as coating system

Independently fire tested and approved to major European and national standards including:

• EN 13381 part 8 (ETA 20/1197)
• Water based coating for steel protection according to EN 13501-2 and EAD 350402-00-1106, DoP, with CE-mark

18 months

In originally sealed containers in a cool and dry environment.

Protect against frost!

~1.35 g/cm³

Not applicable

~71 % ± 3 % by volume (according  to BCF Guidance Method)

Max. 80 %, application temperature shall be at least ≥ 3 K above dew point.

During application and drying of total Sika® Unitherm® coating system including Sika® Unitherm® or SikaCor® topcoats as well as transportation special protection measures must be taken against weathering.

Object temperature not below + 5°C, to max. + 40°C.*

*If higher temperatures occur, please consult the technical department for further assistance.

Sika® Unitherm®-120 Steel W New requires a minimum of 24 h drying prior to application with itself or topcoats of Sika® Unitherm® and SikaCor® range.

A complete drying of the fire protection coating prior topcoat application is highly recommended.

Through-drying of Sika® Unitherm®-120 Steel W New can be checked by ‘fingernail-test’.

Prior to further applications possible contaminations must be removed.

Drying/Curing
Approx. 24 h for each fire protection coat for interior use at approx. + 20°C object temperature and 60 % relative humidity.

Different temperatures, different relative humidity and different fire protection coating thicknesses have an influence on drying time.

Drying stage at + 20°C, 60 % rel. humidty and 1000 μm dry film thickness:

Example:

1000 μm dry ≈ 1300 to 1400 μm wet ≈ 1900 g/m² ≈ 1.41 l/m²

Fire rate of Sika® Unitherm®-120 Steel W New depends on national standard.

See corresponding separate consumption table / diagram.

Note: Ratio dry film thickness - wet film thickness varies depending on application method.

Furthermore, proper ventilation is recommended.

Blast cleaned steel:

Blast-cleaning to Sa 2 ½ according to ISO 8501-1.
Free from dirt, oil and grease.

Steel with manual de-rusting:
Manual de-rusting (wire brushing or power tool cleaning) according to ISO 8501-1, St. 3.

Galvanized steel:
Free from dirt, oil, grease and zinc salts.
In case of permanent exposure to submersion and condensation surfaces should be sweep blasted according to ISO 12944-4.

Other surfaces:
Tests should be carried out on the specific surfaces.

Please seek further information on info data sheet no. 02 ‘Primers for Sika® fire protection coatings’.

For contaminated and weathered surfaces e.g. galvanized or primed areas we recommend to clean with SikaCor® Wash.

For further information, please consult the Technical Department.

Stir thoroughly with slowly turning mechanical stirrer, free of lumps.

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. In case of application by roller or brush, additional layers may become necessary to achieve the required coating thickness, depending on type of construction, site conditions, colour shade etc. Prior to application a trial on site may be useful to ensure the selected application method will provide the requested results.

Airless-spraying:

• Material shall be applied undiluted
• Airless spray equipment with transmission
  ratio > 45 : 1
• Screens and filters must be removed
• Hose diameter not below ⅜“
• Whip 1,5 - 2 m, diameter 6 may be used
• Nozzle size 0.46 - 0.61 mm (0.019 - 0.024 inch)
• Hoses must be used for water based products only
   

Brushing / rolling:

• Material shall be applied undiluted
• Load natural fine bristle brushes or short pile lambswool rollers are recommended

Immediately after use with water.