Ruetgers ST100
Intumescent Water Based Fire Protection Steel Coating

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Robertson Coatings are fully accredited contractors and specialize in applying Ruetgers water based intumescent steel coating, ST100.  We also provide ISO 9001/2008 certification that ensures you are dealing with a company that meets the highest standards of quality and safety.

Ruetgers ST100 is a waterborne intumescent coating for fire protection of internal structural steelwork (columns, beams, framework) that has been developed to protect life and assets.

Ruetgers ST100 is applied via airless spraying (preferred), brushing or rolling directly to the primed I & H section columns and beams and hollow sections to provide fire protection for up to 90 minutes.

Intumescent coatings swell to form a layer of char foam in case of fire or heat (250-300°c).  The foam layer protects the substrate from heat transfer for a period of time (eg. 30, 60 or 90 minutes).

The Ruetgers Advantage

Properties & Performance

Colour & finish

Off white - surface and texture depending on the application process

Maximum thickness per coat

It is recommended not to apply more than 1500µm of wet material to give best control on surface appearance and thickness

Practical coverage

Dependent on substrate, application method and environmental conditions

Theoretical coverage

1.000 g/m ----> 800 µm wet film ----> 520 µm dry film

Number of coats

One or more as required

Drying time

At 20°C, 60% relative air humidity and an application rate of 1000g/m2:

  • Dry to touch after approximately 4 hours
  • Can be recoated after approximately 24 hours

Solids by weight

69-71%

Density

Approximately 1.27 g/cm3 at 20oC

Surface burning

B-s1, d0 acc. EN13501-1

pH value

Approximately 7.5

Fire resistance
  • AS1530.4
  • BS476
  • DIN4102
  • EN13501-1