Product Data Sheet Safety Data Sheet Show all documents

Sika® Pyroplast® Top W

Water based topcoat for fire protection coatings on wood

Sika® Pyroplast® Top W is a single pack topcoat specially designed for Sika® Pyroplast® intumescent fire protection systems against humidity and mechanical strain. Sika® Pyroplast® Top W has no impact on the formation of the heat insulating foam of the intumescent coatings.

  • No impact on the foaming reaction of intumescent coatings
  • VOC Sika® Pyroplast® Top W < 48 g/l
  • Free of halogens and aromatic solvents
  • Applicable on all Sika® Pyroplast® intumescent coating systems for wood
  • Meets Type Z1 classification (i.e. internal conditions include temperatures till + 5°C and high humidity) as part of the coating system
  • Complies with the highest quality requirements
    (level 4) of DGNB as part of the coating system
  • Simple application, does not increase static load
  • Individual coloration possible various colour shades in RAL, others available
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika® Pyroplast® Top W is used as topcoat on fire protected wood for weathering and / or decorative reasons. In special conditions, i.e. frequent formation of condensation and / or heating up of surfaces above + 45°C, adequate arrangements should be taken. In dry and clean conditions, top coating with Sika® Pyroplast® Top W on Sika® Pyroplast® fire protection coatings may not required.  

Advantages

  • No impact on the foaming reaction of intumescent coatings
  • VOC Sika® Pyroplast® Top W < 48 g/l
  • Free of halogens and aromatic solvents
  • Applicable on all Sika® Pyroplast® intumescent coating systems for wood
  • Meets Type Z1 classification (i.e. internal conditions include temperatures till + 5°C and high humidity) as part of the coating system
  • Complies with the highest quality requirements
    (level 4) of DGNB as part of the coating system
  • Simple application, does not increase static load
  • Individual coloration possible various colour shades in RAL, others available

Packaging

Sika® Pyroplast® Top W11 kg and 3 l net.

Colour

RAL colour shades

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

  • Complies with German AgBB and French VOC (A+) when used as part of the coating system  

Product Information

Shelf life

18 months

Storage conditions

In originally sealed containers in a cool and dry environment.

Protect against frost!

Density

~1,25 g/cm3 at + 20°C

Flash point

Not applicable

Solid content

~45 % by weight

(according ISO 3251)

Application

Application Information

Relative air humidity

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

During application and drying of total Sika® Pyroplast® coating system including Sika® Pyroplast® Top W as well as transportation special protection measures must be taken against weathering.

Note: With critical situations i.e. frequent formation of condensation and / or heating up of surfaces above + 45°C, adequate arrangements should be taken.

Surface temperature

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

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

Waiting time to overcoating

Sika® Pyroplast® Top W requires a minimum of 6 h drying prior application with itself.

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

Through-drying of the used Sika® Pyroplast® intumescent coating can be checked by 'fingernail-test'.

Prior to further applications possible contaminations must be removed.

 

Drying time

Drying/Curing

Average drying time of Sika® Pyroplast® Top W at approx. + 20°C object temperature and 60 % relative humidity:

Touch-dry~0.5 h
Overcoatable with itself~6 h
Through-drying

~24 h

Different temperature, different relative humidity and different coating thickness have an influence on drying time.
Consumption

Consumption

Interior use, wood:

Dry film thickness~50 μm
Theoretical coveragemin. 120 g/m2

Due to an unleaded and unchromated pigment coating, a higher loading of 200 g/m2 (160 ml/m2) is required in several work steps to reach the designated opacity.

The quantities do not cover any material wastages. In case of diluting the loading has to be increased.
Application steps

SURFACE PREPARATION

Prior application of Sika® Pyroplast® Top W, the surface to be coated must be dry, clean and free from dirt, oil, grease or any other contamination.

MIXING

Stir thoroughly, free of lumps.

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. 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.
 

Brushing and rolling:

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

Airless spraying:

  • Material shall be applied undiluted
  • Airless spray equipment with transmission ≥ 30 : 1, pressure approx. 180 bar
  • Whip line ¼ " may be used
  • Nozzle size 0.28 - 0.38 mm (0.011 - 0.015 inch)
  • Hoses must be used for water based products only!

Above data shall be used as a guideline with variations being made to suit local conditions.

 

CLEANING OF EQUIPMENT

Immediately after use with water.

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