Flame-retardant (FR) foams and flammability standards
TechnicalMay 19, 2026
BS 5852, EN 1021, EN 45545 - which standard applies to which market, what the tests actually check, and what an FR label does not mean.
Flammability is an area where specifications must be precise: "flame-retardant foam" without a named standard means nothing, because every test checks a different scenario.
Key standards by market
| Standard | Market / application | Test scenario |
|---|---|---|
| EN 1021-1 | EU furniture | smouldering cigarette |
| EN 1021-2 | EU furniture | small flame (match) |
| BS 5852 Crib 5 | UK furniture | wooden crib - the strictest |
| EN 45545 | railway vehicles | complete requirement system |
How foam becomes FR
Reduced flammability is achieved with additives in the formulation or with dedicated CMHR (Combustion Modified High Resilience) formulations. There are consequences for other properties: FR grades usually have higher density and a somewhat different feel, and the formulation also affects ageing.
What an FR label does NOT mean
- FR foam is not non-flammable - ignitability and flame spread are reduced in a defined scenario.
- Passing one test does not imply passing another: EN 1021-1 is far milder than Crib 5.
- A certificate applies to the composite as tested: the same foam with a different cover fabric can fail a furniture test.
How to specify
State the target market and the standard the end product must meet - and if you don't know the standard, describe the product and where it is sold. We will propose a grade from the range and the documentation that goes with it. Send an inquiry with these details.
Have a specific case?
Send dimensions, quantity and intended use - we propose a foam grade and send a quote or sample.
Send an inquiry