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| Probable Euro-class ranking of products based on Flashover FIGRA index – ISO 9705 | ||
| Material: likely examples | Euroclass | Flashover potential |
| Brick | A1 | No |
| Concrete | A1 | No |
| Mineral wool | A1 | No |
| Cement particle board | A2 | No |
| Plasterboard | A2 | No |
| Glasswool insulation (foil faced) | A2 | No |
| Painted gypsum board | B | No |
| Some fire resistant mdf | B | No |
| Some birch plywood | B | No |
| Most fire resistant mdf | C | Yes |
| Some European plywoods | C | Yes |
| Phenolic foam (foil faced) | C | Yes |
| Expanded polystyrene type A | D | Yes |
| Polyisocyanurate foam (foil faced) | D | Yes |
| Extruded polystyrene | D | Yes |
| Vinyl wallcovering (gravure print) | D | Yes |
| Polyurethane foam | E | Yes |
| Polyisocyanurate foam (sprayed) | E | Yes |
| Wood fibreboard (vacuum pressed) | E | Yes |
| Expanded polystyrene type N | F | Yes |
| Polyurethane cored panel (flame to edge) | F | Yes |
| Untested or fails Euroclass E | F | Yes |