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Product images: the manufacturer (official).
Thin-film · cellulosic
Water-based intumescent coating
A low-odour, water-borne thin-film coating for steel in dry interiors – offices, schools, shopping centres and car parks with a protective topcoat.
- Cellulosic (building)
- Fire type
- R30 – R120
- Typical rating
- Interior, dry
- Exposure
Supplied by World Steel with your steel building or on its own – one order, one shipment, one partner.
Overview
About Water-based intumescent coating
Applied like paint by airless spray, brush or roller over a compatible primer.
In a fire the coating expands into a thick insulating char that slows heating of the steel.
Thickness is set per member from the section factor, the critical temperature and the required rating.
Key benefits
- Slim, architectural finish – the shape of the steel stays visible
- Low VOC and low odour for occupied buildings
- Can be applied in the shop, so steel arrives protected
- Decorative topcoat in any colour
World Steel · building envelope hub
How we use Water-based intumescent coating in steel buildings
World Steel can apply the primer and intumescent coating in our blasting and painting shop, so members arrive at site already fire-protected – thickness per member from the fire engineer's schedule, recorded in the coating report.
- 01Specified with the structure – thickness, density and facing matched to the roof, wall and fire design.
- 02Quantities taken from the same 3D model as the steel, purlins and cladding.
- 03Packed and shipped with the steel package – one delivery schedule to site.
Applications
Where Water-based intumescent coating is used
- Exposed steel in atriums, lobbies and façades behind glass
- Office, retail and education buildings
- Car parks with suitable topcoat
Technical data
Water-based intumescent coating – technical properties
Typical properties
| Property | Unit | Value |
|---|---|---|
| Fire curve | — | Standard (cellulosic) – ISO 834 / ASTM E119 / AS 1530.4 |
| Typical rating range | min | 30 – 120 |
| Typical dry film thickness | mm | ≈ 0.3 – 3 (member-specific) |
| Environment | — | Interior C1 – C2; C3 with approved topcoat |
Values as published by the manufacturer for this market. Always check the current data sheet and the approvals required for your project before ordering.
FAQ
Frequently asked questions
What thickness of water-based intumescent coating do I need?
It depends on the member size (section factor), the critical temperature and the required fire rating – the fire engineer or the manufacturer's tested data gives a thickness for each member.
Does World Steel supply branded products?
Yes – we supply the brand and listed system your specification or authority requires. This page describes the product type.
One partner for structure and envelope
Send us your drawings or bill of quantities – we quote the steel, insulation, boards and ceilings together and ship them as one package.