Section factor first
Paint thickness depends on the section factor (heated perimeter ÷ area). A slightly heavier, more compact section can need far less intumescent – we compare both and choose the cheaper total.
Passive fire protection for structural steel
The optimum fire-protection paint solution for your project
Steel loses about half of its strength at around 550 °C. Intumescent paint swells into an insulating char in a fire and keeps the steel below its critical temperature for 30 to 120 minutes – we make sure you get the rating you need with the least paint possible.
When does a Thai building need fire-rated steel?
Under Thailand's Building Control Act and its Ministerial Regulations, the structural members of high-rise buildings, large buildings and many buildings used by the public must achieve a specified fire-resistance period – commonly one to three hours depending on the building class and the member. Factories, warehouses storing combustible goods and buildings insured under international programmes often require it too.
The required period is set by your architect or Thai licensed engineer and the local authority. We take that requirement and turn it into the most economical coating specification, member by member.
Cost cut at the design stage
How we optimise fire protection
The right product for the rating
Thin-film intumescents for R30–R90, high-build or epoxy systems where R120 or hydrocarbon fires apply – from international brands with third-party assessed thickness tables.
Critical temperature by design
Using the real utilisation of each member instead of a default 550 °C often lowers the required thickness further.
Factory application
Blast-cleaned to Sa 2½, primed with a compatible primer and sprayed in our factory under controlled humidity – thickness measured and recorded for every member.
Topcoat for Thai climate
Humid, coastal or semi-exposed areas get a sealer or polyurethane topcoat so the intumescent stays effective for the life of the building.
Protected in transit
Edge protection, wrapping and a touch-up kit with the shipment – damage from handling is repaired in minutes, not days.
Coating system
A typical intumescent system
- 1
Surface preparation
Abrasive blast cleaning to Sa 2½ (ISO 8501-1), profile checked before priming.
- 2
Primer
Epoxy or alkyd primer approved by the intumescent manufacturer, typically 50–80 µm.
- 3
Intumescent basecoat
Thickness per member from the assessed tables – from a few hundred microns for R30 to several millimetres for R120.
- 4
Topcoat / sealer
Acrylic or polyurethane topcoat in your chosen RAL colour for durability and appearance.
Ratings
Fire-resistance ratings
Products from international coating brands
We apply intumescent systems from manufacturers such as Jotun (SteelMaster), International / AkzoNobel (Interchar), Hempel (Hempacore), Sherwin-Williams (Firetex) and Carboline – or the brand named in your specification. Every project receives the product data sheets, assessment certificates and our DFT records.
FAQ
Questions Thai clients ask us
Is it better to paint in the factory or on site?
Factory application gives controlled conditions, faster drying and recorded thickness, and keeps painting off your critical path. Site application suits members that must be welded on site or very large members; many projects combine both with site touch-up.
How long does intumescent paint last?
Properly specified and top-coated systems in interior or sheltered conditions are designed for the long-term life of the building; the manufacturer's maintenance guidance is included with our handover documents.
Can you quote fire protection only for part of the building?
Yes. Many buildings only need rated escape routes, mezzanines or specific frames. Mark the zones on the drawings and we price only those members.
Send your drawings – get the frame and the most economical fire-protection system priced together
Structural design, fabrication, fire protection and CIF or DDP delivery in one quotation. Answer within 48 hours.