Fire-Resistant Coatings Applied to Perfectly Prepared Steel
Commercial Shot Blasting offers a complete intumescent painting service for structural steel, fire escapes, and industrial metalwork. We shot blast to Sa 2.5, apply certified intumescent coatings, and provide full DFT documentation for fire resistance ratings from R30 to R120.
We assess the steel, confirm the required fire resistance rating (R30, R60, R90, R120), and agree the coating system and DFT specification.
All steel is shot blasted to Sa 2.5 or Sa 3 to remove mill scale, rust, and old coatings and create the correct surface profile for maximum adhesion.
An approved zinc-rich or epoxy primer is applied immediately after blasting to prevent flash rusting and provide the correct base for the intumescent topcoat.
The intumescent basecoat is applied in controlled passes to achieve the specified DFT for the required fire resistance rating. DFT is measured and logged.
A protective sealer or decorative topcoat is applied over the intumescent layer for weather resistance and the required finish colour.
A full DFT survey is carried out and a coating report issued, ready for building control or fire engineer sign-off.
Intumescent paint expands under heat to create an insulating char layer around steel, maintaining structural integrity for the specified fire resistance period — typically R30, R60, R90, or R120.
Intumescent coatings require strong adhesion to perform correctly. Shot blasting to Sa 2.5 removes all contaminants and creates the surface profile needed for maximum mechanical adhesion.
We can achieve fire resistance ratings from R30 to R120 depending on the steel section factor, the coating system specified, and the required DFT.
Yes. We measure dry film thickness on every coated member and provide a full coating report with product data sheets, batch numbers, and thickness readings for building control.
Our mobile units deliver intumescent painting — fire-resistant coatings for structural steel services across 35 counties in England and Wales. Select a county to see all the towns and areas we cover.
Contact Commercial Shot Blasting for professional intumescent painting — fire-resistant coatings for structural steel services across the UK.
Phone: 07970 566409
Email: [email protected]