Intumescent paint for already primed structural steel and cast iron

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(Out of stock)

Intumescent paint systems provide fire resistance to structural steel and cast iron in internal envi­ron­ments. This Thermoguard intumescent offers up to ninety minutes fire protection to horizontal structural steel members.

In a fire the intumescent coating expands to form a foam-like carbon char that insulates and protects the structure from intense heat. This keeps the steel below its critical temperature and maintains the structural integrity and stability

To specify Thermocoat intumescent coatings for passive fire protection to horizontal steels, simply state to paint over an anti-corrosion primer.. Seek  technical guidance to use the higher figures or for use on vertical structural steels.

The intumescent paint is a quick-dry formulation that can be applied by brush, roller or airless spray by any competent contractor. The intumescent may be covered with a flame retardant paint to provide a high quality and robust finish to exposed surfaces.  

Thermoguard intumescent paint for steel has been fully fire tested to BS476:Part 21:1987- Fire Resistance of loadbearing elements of structure for 30, 60, 90 and 120 minutes.

. For timed fire rating please ring for specifi­cation.  .A Certificate of Supply can be issued for each project if requested at time of order.

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Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alter­natively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alter­natively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the respon­sibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.