Product Data Sheet Safety Data Sheet Show all documents

SikaCor® Alutherm

Heat resistant silicone resin coating for steel

SikaCor® Alutherm is a 1-pack topcoat, based on a silicone resin.

  • TO DO
Product Data Sheet Safety Data Sheet Show all documents

Usage

SikaCor® Alutherm may only be used by experienced professionals.

High temperature and weather resistant protective coating for atmospheric corrosion protection.

For hot steel surfaces in power stations, refineries, chemical industries. Suitable for metal chimneys, rotary kilns, steam pipes, industrial furnaces etc.

Advantages

  • Temperature resistant with primer from + 400°C up to + 540°C
  • Temperature resistant without primer up to + 600°C

Packaging

SikaCor® Alutherm25 kg net.
Sika® Thinner S25 l, 10 l and 3 l

Appearance and Colour

Aluminium, approx. RAL 9006 silkglossy

Product Details

Technical Information

Chemical resistance

  • The fully cured material is weather resistant

 

Temperature resistance

  • Dry heat up to approx. + 600°C; with zinc dust primers (e.g. SikaCor® Zinc ZS) up to max. + 540°C.
 
Product Information

Shelf life

1 year

Storage conditions

In originally sealed containers in a cool and dry environment.

Density

~1,2 g/cm3

Solid content

~31 % by volume
~49 % by weight

Application

Application Information

Thinner

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

Material temperature

Min. + 5°C

 

Relative air humidity

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

Surface temperature

Min. + 5°C .

Waiting time to overcoating

At + 20°C Min. 24 h

Drying time

Drying time at + 20°C

Dust dry after ~30 min
Touch dry after ~90 min

 

Final drying time

Prior to temperature exposure min. 1 week, please avoid sudden temperature feed.
For final curing/reaction and for achieving of all product properties a minimum temperature of + 180°C to + 200°C over a period of 2 h is necessary.

Consumption

Consumption

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

Dry film thickness

40 μm

Wet film thickness

130 μm

Consumption

~0.155kg/m²

VOC~79gsm
Application steps

SURFACE PREPARATION

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

MIXING

SikaCor® Alutherm is supplied ready for use. Stir thoroughly prior to application, preferable with electric stirrer.

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:

  • Undiluted
  • Only suitable for small areas

 

Conventional high pressure spraying:

  • Nozzle size 0.8 - 1.5 mm
  • Pressure 2 - 4 bar

 

Airless-spraying:

  • Pressure min. 150 bar
  • Nozzle size 0.33 - 0.46 mm (0.013 - 0.019 inch)
  • Spraying angle 40° - 80°

CLEANING OF EQUIPMENT

Sika® Thinner S.

Documents