Intumescent Coating Thickness Calculator

Passive Fire Protection (PFP): Compute dry film thickness (DFT), wet film thickness (WFT), and volume consumption for R30 through R120 steel fire ratings.

Fire Rating & Profile Specification

Fire Resistance Target:

Critical Design Temp $\theta_{crit}$ (°C):

Section Factor $A_m/V$ (m⁻¹):

Volume Solids $VS$ (%):

Total Steel Surface Area (m²):

Coating Thickness & Paint Volume Estimates

Required DFT

-- μm

Required WFT

-- μm

Coverage

-- m²/L

Total Paint Volume

-- L

Estimated Swelling Multiplier: ~45× to 50× (Char thickness: -- mm)

Application Coats: -- (assuming ~500 μm DFT max per airless spray coat)

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Intumescent Coating Thickness Calculator

Fire Rating & Profile Specification

Coating Thickness & Paint Volume Estimates

Frequently Asked Questions