Especially recommended in emission controls on smokestacks especially when it requires a high purity filter or when the physical or chemical properties of gases are extreme: temperatures above 500 ° C or high concentration acid (except HF). Its use is also highly recommended for analytical determination of heavy metals in the atmosphere and gravity measurements in gases: smoke, aerosols, etc..
| Ref | Weight gr/m2 | Thickness mm | DOP Retention (%) at 0.3 μm | Maximum temperature ºC | Bonding agent |
| 85 | 0.38 | 99.999 | 900 | NONE |