Sherwin-Williams Firetex FX1003


Sherwin-Williams Firetex FX1003 is a single pack, thin film intumescent coating, designed for site application by airless spray, to provide fire resistance for up to 120 minutes on structural steel.

VAT excluded

£262.10 Tax incl.


After appropriate drying, Firetex FX1003 specifications can be exposed to the weather for up to 6 months provided that the specific use does not lead to ponding water due to rainfall, condensation or other site circumstances.

Sherwin-Williams Firetex FX1003 can resist normal weather conditions for up to 6 months without topcoat provided it has had appropriate drying prior to exposure. Once an approved topcoat has been applied as appropriate to the prevailing conditions, then durability will be substantially enhanced. If the specific use or storage could lead to prolonged contact with water due to rainfall, condensation, or other site/transportation/storage circumstances, then a recommended topcoat must be used to prevent damage to the basecoat.


Certifire Approved – Certificate CF5077

This product has been assessed in accordance with the Criteria of Acceptability given in the ASFP/BCF “Industry Guidance Document”. This product has been tested and assessed in accordance with the ASFP fi retesting protocol for cellular beam protection. See Section 6.3 from ASFP “Yellow Book” 4th Edition.

Recommended Primers

Several primers have been approved for use under Sherwin-Williams Firetex FX1003. For more information please consult our technical team.

Recommended Topcoats

For certain dry, internal situations where the final colour/ appearance is not critical, then Firetex FX1003 may remain un-topcoated.

For externally exposed steelwork up to C4 and severe internal environments Acrolon C137V2 or Acrolon C237 must be used as a topcoat.

For other internal environments where a topcoat is required then Firetex M71V2 or Sher-Cryl M770 should be used. In all instances for subsequent re-decoration, use Firetex M71V2, Sher-Cryl M770, Acrolon C137V2 or Acrolon C237 as appropriate. 

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.

Product Details

Data sheet

Brush, Spray
Touch Dry
30 minutes

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.

questions natalie on 2019-09-02 10:58:37

Can I spray an eggshell paint over the FX1003 as a internal decorative ceiling colour in an industrial unit where only smoke detection is required and no sprinklers? Thanks


Sherwin-Williams Firetex FX1003 should only be over coated with an approved Sherwin-Williams topcoat. Assuming an internal C1/C2 environment, as an example Sherwin-Williams Firetex M71V2 could be used over Sherwin-Williams Firetex FX1003 and provides a decorative sheen finish topcoat in almost any RAL or BS colour. 

questions Clive Rowe on 2019-07-17 11:54:58

What are the coverages recommended to attain 30 minutes fire rating on structural steel for FX1003?


In order to answer this question we would need you to provide our technical team ([email protected]) with as much of the following information as possible;

  • Level of fire protection required (i.e. 30, 60, 90min, etc.)
  • Each steel section dimension (i.e. 254x146x37 UB)
  • Quantity and length of each section (or overall meterage for each section)
  • Orientation (horizontal or vertical)
  • Number of sides to be painted (all sides, 3 sides, 1 flange, etc.)
  • Environment (internal, external, car park, chemical exposure, etc.)
  • Application on site or in shop

Alternatively you can just forward us drawings, fabrication/cutting lists and we'll extract the information from them but in that instance we'd need some guidance as to what to allow for i.e. all steels on first floor, etc.

questions eric french on 2019-01-21 11:08:58

what are the appropriate thinners/cleaner for FX1003 and C137V2 ?


Sherwin-Williams recommend Firetex FX1003 is thinned/cleaned with Sherwin-Williams Cleanser/Thinner No.2Sherwin-Williams Acrolon C137V2 is recommended to be thinned with Sherwin-Williams Cleanser/Thinner No.15 and cleaned with Sherwin-Williams Cleanser/Thinner No.5.

Question about the product

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