| 3 M Attest R 1264/1262 | Humidity | Exposure time (min) | |||
| At 50˚C | 15 | 20 | 25 | 30 | |
| B. atrophaeus (AttestTM 1264) | 100% | + | + | + | − |
| G. stearothermophilus (AttestTM 1262) | 100% | + | + | − | − |