3M™ Microfinishing Film Sheet 372L is fast cutting and delivers a precise, uniform, close-tolerance finish. A high friction coating on 5 mil polyester film backing helps to prevent abrasive from slipping. Use on metal, plastic, paint spot repair, automotive power train components and more. Micron-graded Mineral with Advantages Available in a broad range of fine micron-graded aluminum oxide, 3M™ Microfinishing Film Sheet 372L features a flexible, film backing with a high-friction coating for better grip. A polyester film backing is typically stronger than paper backings and more conformable to part profiles. It is waterproof so can be used in wet applications. A hard resin bond is durable and consistent and will produce consistent finishes and stock removal. Recommended Applications Miscellaneous abrasive applications (leather). In a sheet form, the film may be cut. This flexibility enables operators to reap the benefits of a microfinishing film and still tackle tough areas that might be inaccessible to other tools and machines.
- Micron-graded aluminum oxide abrasive mineral provides precise, uniform, close-tolerance finishes
- High friction coating on film backing (backsize) to prevent slipping
- Resin bond Sheet may be cut and shaped for hand pads or back up pads
- Ideal for metal, plastic, paint spot repair and automotive powertrain components
| Abrasive Material | Aluminum Oxide |
| Backing Material | Polyester Film |
| Backing Thickness (Imperial) | 5.0 mil |
| Bond Type | Resin |
| Brand | 3M |
| Core Size (Imperial) | 0.0 NP |
| Grade | Non Pertinent |
| Grit | Non Pertinent |
| Micron Grade | 20 μm |
| Product Form | Sheet |
| Collection | 3M™ |
| Width (in) | 8.5 |
| Length (in) | 11 |


