Product Data Sheet Show all documents

Sika® Unitherm® Platinum

Solvent-free, ultra high build, 2-pack, modified epoxy based intumescent fire protection coating for internally or externally exposed structural steel

Sika® Unitherm® Platinum is a solvent-free, 100 % solids, 2-pack, modified epoxy based intumescent fire protection coating for internally or externally exposed structural steel, where it provides highest durability and combined corrosion protection (up to ISO 12944, corrosivity category C5) and fire protection (up to R90). It is easily applied with standard airless spray equipment, requires no reinforcement, cures rapidly to a very tough and damage resistant finish, ready for handling and transport at the next day. Solvent-free according to Protective Coatings Directive of German Paint Industry Association (VdL-RL 04).

  • Solvent-free, 100 % solids
  • Low odour and zero flash risk
  • Halogen-free
  • Easy application with single-leg spray equipment
  • Can be applied in 1-coat for up to 4 mm dry film thickness, no additional reinforcement required at any time
  • Application directly on blast cleaned steel surfaces
  • Rapid cure - next day handling and transport
  • Very tough - minimal handling damage and touch-up costs
  • Highly resistant to mechanical impact and damage in service
  • Suitable for small sections and complex steel sections
  • Very good cosmetic appearance
  • Durable for a long service life
  • Expected life cycle > 25 years
  • Meets Type X classification (i.e. exterior conditions), no primer and top coat needed
  • Excellent corrosion protection properties according to ISO 12944, corrosivity class C5 (as coating system)
  • Complies with the quality requirements (level 3) of DGNB
Product Data Sheet Show all documents

Usage

Sika® Unitherm® Platinum is designed primarily for in-shop application on structural steel that is to be internally or externally exposed. No additional sealers or top coats are required unless specific lightfast coloured finishes are required.  

Advantages

  • Solvent-free, 100 % solids
  • Low odour and zero flash risk
  • Halogen-free
  • Easy application with single-leg spray equipment
  • Can be applied in 1-coat for up to 4 mm dry film thickness, no additional reinforcement required at any time
  • Application directly on blast cleaned steel surfaces
  • Rapid cure - next day handling and transport
  • Very tough - minimal handling damage and touch-up costs
  • Highly resistant to mechanical impact and damage in service
  • Suitable for small sections and complex steel sections
  • Very good cosmetic appearance
  • Durable for a long service life
  • Expected life cycle > 25 years
  • Meets Type X classification (i.e. exterior conditions), no primer and top coat needed
  • Excellent corrosion protection properties according to ISO 12944, corrosivity class C5 (as coating system)
  • Complies with the quality requirements (level 3) of DGNB

Packaging

Sika® Unitherm® Platinum

16.8 kg and 3.7 kg net.

Sika® Thinner E+B

25 l and 5 l

Colour

Light grey, approx. RAL 7035

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

  • Complies with Indoor Air Comfort Gold® limit values by EUROFINS, even as coating system

APPROVALS / CERTIFICATES

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

  • EN 13381-8 (ref: ETA 11/0014)
  • BS 476 parts 20-22 (ref: CF 821)
  • Coating based on epoxy resin for steel protection according to EN 13501-2 and ETAG 018-2, DoP, with CE-mark
 
Product Information

Shelf life

24 Months

Storage conditions

In originally sealed containers in a cool and dry environment.

Density

~1.3 kg/l (± 0.1)

Flash point

Not applicable

Solid content

~100 % by volume
~100 % by weight
Technical Information

Abrasion resistance

~65 mg/1000 R (load: 1000g; disc: CS 10)

(ISO 5470-1)

Compressive strength

~45 MPa

(ISO 604)

Tensile strength

~10 MPa

(ISO 527-2)

Tensile adhesion strength

Blastcleaned steel

~10 N/mm2


Primed steel

Dependent on the
primer / system

Chemical resistance

H2SO4 (10%)

168 h

NaOH (10%)

168 h

Mineral Spirit

168 h

Chemical resistance as coating system

Application

Application Information

Mixing ratio

Components A : B

By weight100 : 12
By volume100 : 18.4

Relative air humidity

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

Surface temperature

Substrate surface and ambient: At least + 10°C, max. + 40°C*

Optimum results are achieved at temperatures over + 16°C

*If higher temperatures occur, please consult the Technical Department for further assistance.

Pot Life

At + 20°C

~30 min

At + 35°C~15 min

Curing time

Curing and handling (at + 20°C)

Touch dry~8 h

Hard dry

(ready for handling and transport)


~24 h

Waiting time to overcoating

Overcoating, intervals / intercoat, waiting times (at + 20°C)


Between primer and Sika® Unitherm® Platinum:
After the primer reached its final drying time


Between Sika® Unitherm® Platinum coats:

Min.8 h at + 20°C
Max.

Interior: 7 days at + 20°C

Exterior: 2 days at + 20°C

 

Between Sika® Unitherm® Platinum and SikaCor® EG-4, SikaCor® EG-5, SikaCor® PUR Color NEW, Sika® Permacor®-2330, Sika® Permacor®-2230 VHS or Sika® Permacor®-2707:

Min.24 h at + 20°C
Max.

Interior: 7 days at + 20°C

Exterior: 2 days at + 20°C

Note: The previously applied coating must be dry and free from any dirt, moisture or contaminants that could prevent or reduce adhesion (clean if necessary). If waiting times are longer than stated, then the coatings should be reactivated by suitable mechanical and / or chemical means.
 

Temporary storage or transport of coated steelwork must be carried out in an appropriate manner. It is ‘good practise’ that straps or chains must not be placed in direct contact with the coated surface.
Consumption

Consumption

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

Dry film thickness1.000 μm
Wet film thickness

1.000 μm

Consumption

~1.3 kg/m2
Coverage~0.77 m2/kg
Application steps

SURFACE PREPARATION

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.

MIXING

Stir component A very thoroughly using an electric mixer (start slowly, then increase up to approx. 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. During mixing and handling of the materials always wear protective goggles, suitable gloves and other protective clothings.

 

APPLICATION

Application by airless spray will give the best results and is recommended to achieve uniform thickness and appearance. 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.
Do not thin Sika® Unitherm® Platinum!

Brushing/Rolling:

  • Smaller areas


Airless spraying:
Airless spray equipment i.e. single-leg spray equipment with a flow heater, or plural component spray equipment.

  • Pressure ratio: ≥ 66 : 1
  • Flow rate: ≥ 24 l/min
  • Pressure rate: at least 200 bar in the spray gun
  • Nozzle size 0.48 - 0.64 mm (0.019 - 0.025 inch)
  • Spraying angle 20° - 40°
  • Material temperature:
    approx. + 35°C at the nozzle outlet


Helpful hints:

  • Remove filter mesh
  • Use direct material feed (without suction hose)
  • At lower temperatures we recommend insulating the spray hose
  • Max. 25 m length of spray hose
  • Please adjust the spraying angles and nozzle sizes to your steel structure sizes to optimize overspray and consumption


Repairs:
To make good any misses or damage, abrade adjacent areas to a matt finish, clean off all traces of dust. Mask if necessary and then apply the Sika® Unitherm® Platinum immediately.

CLEANING OF EQUIPMENT

Thoroughly clean tools and equipment with Sika® Thinner E+B immediately after completion or interruption of the Sika® Unitherm® Platinum application process.

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