Answer page · FR clothing
Catalogues use 'flame retardant', 'flame resistant', 'FR' and even 'fireproof' as if they were interchangeable. They aren't — one describes a chemistry, one a performance, one is marketing that should make you suspicious — and the way through the fog is always the same question: which standard, which code letters?
The definitions
Flame resistant (FR) is the performance claim: the fabric resists ignition and self-extinguishes when the flame source is removed — no melting, no dripping, no continuing burn. This is what the workwear standards test. Flame retardant, used precisely, describes how that performance was achieved on treated fabrics: a chemical finish applied to (usually) cotton — the 'treated' half of the inherent vs treated split, with the wash-life consequences our FR laundering guide covers. In practice the trades use the terms loosely; the label doesn't.
Fireproof is not a thing. No wearable fabric is unaffected by fire; garments buy escape time and reduced burn area, not immunity — a catalogue using 'fireproof' unironically is telling you about its own rigour. And self-extinguishing is the observable behaviour inside the FR definition, sometimes quoted alone by marketers because it sounds like a certification. It isn't.
The question that settles every listing: certified to what? EN ISO 11612 with its code letters for heat and flame, EN ISO 11611 for welding, IEC 61482 for arc — a garment that can't answer with a number and letters is workwear-shaped, whatever adjective it wears.
Quick read
| Term | Actually means | Trust level |
|---|---|---|
| Flame resistant / FR | Resists ignition, self-extinguishes — the tested performance | High — if a standard is cited |
| Flame retardant | The treatment chemistry on treated-cotton FR | Fine — implies wash-life questions to ask |
| Inherent FR | Fibre itself is FR — can't wash out | High — the full story |
| Self-extinguishing | One behaviour within FR performance | Ask for the standard behind it |
| Fireproof | Nothing wearable — marketing red flag | Walk away |
Questions
Used precisely: flame resistant describes the performance (resists ignition, self-extinguishes), flame retardant describes the chemistry that achieves it on treated fabrics. Colloquially they're swapped constantly — what matters on a garment is the certification: the standard number and its code letters.
No. FR clothing resists ignition, self-extinguishes and buys escape time — it does not make fire harmless, and prolonged exposure defeats any fabric. 'Fireproof' in a listing is a marketing red flag rather than a bigger promise.
It names its standards: EN ISO 11612 with code letters for industrial heat and flame, EN ISO 11611 for welding, IEC 61482 for arc flash — plus a CE/UKCA mark and documentation. Adjectives without standard numbers are how non-PPE gets sold at PPE prices.
Both sides of every comparison are one click away — or ask a human to settle it for your team.