Sika Unitherm Steel S (Exterior)


We no longer stock this product, but can recommend Nullifire S606 Solvent-Based Intumescent Coating as a great alternative.

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Product Description

We no longer stock this product, but can recommend Nullifire S606 Solvent-Based Intumescent Coating as a great alternative.

Sika Unitherm Steel S (Exterior) is a solvent based, fast drying, ecological thin film fire protection coating system which has to be used for structural steelwork which is subject to weathering, high humidity, maritime environments, etc. (exterior condition).

Sika Unitherm Steel S (Exterior) can also be used for interior steel constructions as long as they are not designed to German AgBB requirements. Sika Unitherm Steel S (Exterior) forms a heat insulating layer under the influence of fire and improves the fire resistance of structural steel members.

Features & Benefits

  • For use on exterior structural steel members like columns, girders and framework with highly effective protection to delay the steel from reaching critical temperatures.
  • No topcoat required for dry environments except for a coloured decorative finish
  • Fast drying intumescent coating
  • Applicable on steel constructions exposed to weathering
  • Preserves the appearance of a steel construction
  • CE classified according to ETAG 018 part 2, the system meets Type X classification (i.e. exterior conditions)
  • Applicable to filigree and complex steel building elements
  • VOC < 350g/l
  • Simple application, does not increase static load
  • Individual colouration possible with corresponding topcoat, various colour shades in RAL, others available.

Note: With critical situation i.e. frequent formation of condensation and/or heating up of surfaces above 45°C, possible special measures should be taken.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


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