Product Introduction
The 3M™ Microfinishing Film Unbacksized Sheet 366L is a precision-engineered abrasive sheet featuring micron-graded aluminum oxide mineral bonded to a durable polyester film backing. Designed for fast cutting, long life, and a uniform finish, it performs exceptionally well on multiple substrates, including wood, solid surface composites, plastic, fiberglass, primer, e-coat, and metal. Its flexible yet tear-resistant backing allows consistent finishing on contoured surfaces, making it ideal for high-production environments.
3M™ Microfinishing Film Unbacksized Sheet 366L Features
- Micron-graded aluminum oxide abrasive provides a fast cut, long life, and consistent finish across various materials.
- Durable polyester film backing offers superior flexibility and tear resistance for contoured or irregular surfaces.
- Load-resistant coating minimizes dust and debris build-up, maintaining performance and preventing clogging.
- Resin bonding enhances durability and reliability for high-production sanding and finishing operations.
- Sheet form allows easy cutting and shaping to suit custom project dimensions.
- Color-coded by grade to simplify use in multi-step finishing processes and reduce operator error.
3M™ Microfinishing Film Unbacksized Sheet 366L Applications
- Woodworking — ideal for surface preparation, sanding, and finishing on wood and solid surface composites.
- Metalworking — effective on ferrous alloys and metals requiring fine surface finishing.
- Paint preparation — excellent for prepping primer, e-coat, and other coatings before painting.
- Composites and plastics — suitable for achieving smooth finishes on plastic and fiberglass surfaces.
- General industrial use — applicable in transportation, heavy equipment, and manufacturing for precision finishing.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Property | Value |
|---|---|
| Abrasive Material | Aluminum Oxide |
| Application | Sanding, Finishing |
| Backing Material | Polyester Film |
| Backing Thickness (Imperial) | 3 mil |
| Bond Type | Resin |
| Brands | 3M |
| Industries | Woodworking, Composite, General Industrial, AOEM, Paint Preparation, Transportation & Heavy Equipment |
| Micron Grade | 15 μm, 30 μm, 50 μm, 60 μm, 100 μm, 120 μm, 150 μm, 180 μm |
| Product Form | Sheet |
| Sub Applications | Defect Repair/Leveling, Intermediate Sanding, AOEM Finish Prep/Repair, Prepping Metal Prior to Paint, Orbital Sanding |
| Sub Industries | Furniture, Custom Woodworking and Millwork, Cabinetry, Primary Wood and Panel Processing |
