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  • Precision, micron-graded aluminum oxide abrasive offers a fast cut, long life, and uniform finish on many substrates
  • Durable polyester film backing provides flexibility for consistent finishing on contoured surfaces
  • Pressure sensitive adhesive backing allows quick attachment and clean removal for multi-step finishing processes
  • Open coat construction provides aggressive cut and reduced loading
  • Load-resistant coating prevents dust and debris from clogging the disc
  • Adhesive backing for easy attachment

3M™ Microfinishing PSA Film Type D Disc 366L is rated Best in the 3M Microfinishing line of film backed discs. It features micron-graded aluminum oxide abrasive bonded to a durable polyester film backing to produce a fast cut-rate and uniform finish on wood, solid surface composites, plastic, fiberglass, paint prep, coating and corrosion removal, primer, e-coat, or metal.

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3M™ Microfinishing PSA Film Disc 366L, 20 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 40 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 60 Mic 3MIL, Type D, Config
3M™ Microfinishing PSA Film Disc 366L, 20 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 40 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 60 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 30 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 15 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 50 Mic 3MIL, Type D, Config
3M™ Microfinishing PSA Film Disc 366L, 30 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 15 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 50 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 120 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 150 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 100 Mic 3MIL, Type D, Config
3M™ Microfinishing PSA Film Disc 366L, 120 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 150 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 100 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 220 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 80 Mic 3MIL, Type D, Config 3M™ Microfinishing PSA Film Disc 366L, 180 Mic 3MIL, Type D, Config
3M™ Microfinishing PSA Film Disc 366L, 220 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 80 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 180 Mic 3MIL, Type D, Config
Full Retail Price $0.01
Online Only Price $0.01
3M™ Microfinishing PSA Film Disc 366L, 20 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 500 per case 3M™ Microfinishing PSA Film Disc 366L, 80 Mic, Type D, Red, 1 in x NH,
Die 100N 3M™ Microfinishing PSA Film Disc 366L, 15 Mic, Type D, Orange, 3-1/2 in
x NH, Die 350HH
3M™ Microfinishing PSA Film Disc 366L, 20 Mic 3MIL, Type D, 5 in x NH, Die 500X, 500 per case
Full Retail Price $55.80
Online Only Price $35.43
You save $20.37!
3M™ Microfinishing PSA Film Disc 366L, 80 Mic, Type D, Red, 1 in x NH, Die 100N
Full Retail Price $288.00
Online Only Price $182.88
You save $105.12!
3M™ Microfinishing PSA Film Disc 366L, 15 Mic, Type D, Orange, 3-1/2 in x NH, Die 350HH
Full Retail Price $378.00
Online Only Price $240.03
You save $137.97!
3M™ Microfinishing PSA Film Disc 366L, 80 Mic, Type D, Red, 3-1/2 in x
NH, Die 350HH 3M™ Microfinishing PSA Film Disc 366L, 50 Mic, Type D, Purple, 3-1/2 in
x NH, Die 350HH 3M™ Microfinishing PSA Film Disc 366L, 30 Mic, Type D, Green, 3-1/2 in x
NH, Die 350HH
3M™ Microfinishing PSA Film Disc 366L, 80 Mic, Type D, Red, 3-1/2 in x NH, Die 350HH
Full Retail Price $378.00
Online Only Price $240.03
You save $137.97!
3M™ Microfinishing PSA Film Disc 366L, 50 Mic, Type D, Purple, 3-1/2 in x NH, Die 350HH
Full Retail Price $378.00
Online Only Price $240.03
You save $137.97!
3M™ Microfinishing PSA Film Disc 366L, 30 Mic, Type D, Green, 3-1/2 in x NH, Die 350HH
Full Retail Price $396.00
Online Only Price $251.46
You save $144.54!
3M™ Microfinishing PSA Film Disc 366L, 40 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 50 per inner, 500 per case 3M™ Microfinishing PSA Film Disc 366L, 60 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 50 per inner, 500 per case 3M™ Microfinishing PSA Film Disc 366L, 15 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 500 per case
3M™ Microfinishing PSA Film Disc 366L, 15 Mic 3MIL, Type D, 5 in x NH, Die 500X, 500 per case
Full Retail Price $558.00
Online Only Price $354.33
You save $203.67!
3M™ Microfinishing PSA Film Disc 366L, 30 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 50 per inner, 500 per case 3M™ Microfinishing PSA Film Disc 366L, 80 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 50 per inner, 500 per case 3M™ Microfinishing PSA Film Disc 366L, 100 Mic 3MIL, Type D, 5 in x NH,
Die 500X, 50 per inner, 500 per case
3M™ Microfinishing PSA Film Disc 366L, 40 Mic, Type D, Blue, 5 in x 7/16
in, D/F 2HL, Die 500GP 3M™ Microfinishing PSA Film Disc 366L, 60 Mic, Type D, Red, 8 in x NH,
Die 800L 3M™ Microfinishing PSA Film Disc 366L, 120 Mic, Type D, Maroon, 8 in x
NH, Die 800L
3M™ Microfinishing PSA Film Disc 366L, 40 Mic, Type D, Blue, 5 in x 7/16 in, D/F 2HL, Die 500GP
Full Retail Price $570.00
Online Only Price $361.95
You save $208.05!
3M™ Microfinishing PSA Film Disc 366L, 60 Mic, Type D, Red, 8 in x NH, Die 800L
Full Retail Price $576.00
Online Only Price $365.76
You save $210.24!
3M™ Microfinishing PSA Film Disc 366L, 120 Mic, Type D, Maroon, 8 in x NH, Die 800L
Full Retail Price $576.00
Online Only Price $365.76
You save $210.24!
3M™ Microfinishing PSA Film Disc 366L, 40 Mic, Type D, Blue, 4-7/8 in x
NH, Die 487E 3M™ Microfinishing PSA Film Disc 366L, 180 Mic, Type D, Maroon, 4-7/8 in
x NH, Die 487E 3M™ Microfinishing PSA Film Disc 366L, 120 Mic, Type D, Maroon, 4-7/8 in
x NH, Die 487E
3M™ Microfinishing PSA Film Disc 366L, 40 Mic, Type D, Blue, 4-7/8 in x NH, Die 487E
Full Retail Price $600.00
Online Only Price $381.00
You save $219.00!
3M™ Microfinishing PSA Film Disc 366L, 180 Mic, Type D, Maroon, 4-7/8 in x NH, Die 487E
Full Retail Price $600.00
Online Only Price $381.00
You save $219.00!
3M™ Microfinishing PSA Film Disc 366L, 120 Mic, Type D, Maroon, 4-7/8 in x NH, Die 487E
Full Retail Price $600.00
Online Only Price $381.00
You save $219.00!
   
 
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We gave these discs an anti-load coating and open coat surface to increase efficiency and product life by minimizing loading. The abrasive is resin-bonded and supports disc flexibility without sacrificing durability and reliable performance under high heat and pressure. To compliment the effective abrasive action, the polyester film backing flexes to help achieve a consistent finish over contours and offers greater tear-resistance than comparable paper products, making it ideal for high-production environments. And the pressure sensitive adhesive (PSA) provides easy attachment, holds the disc securely in place during use, and removes cleanly from the backup pad (sold separately). Designed for use with orbital and random orbital sanders, this disc comes in a range of micron grades for complete multi-step sanding and finishing.

Our 3M™ Microfinishing PSA Film Disc 366L features precision, micron-graded aluminum oxide, which is a popular choice among industrial professionals because of its fast cut-rate and long life. This mineral makes a tough, durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Due to its fast cut-rate, hardness, and strength, it is widely used in grinding applications in addition to sanding and finishing applications. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, including ferrous alloys.

Sanding discs cut better and last longer when dust isn't clogging the cutting surface of the abrasives. Open coat construction means the abrasive grains are placed with space between them to help evacuate sawdust and other sanding debris and avoid clogging the cutting edge of the grains. The load-resistant coating also allows the disc to continue cutting even when sanding softwoods, paints, and other materials that would, otherwise, clog the disc and hinder sanding ability. Additionally, the open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade. All of this adds up to increased productivity and reduced material consumption.

Our 3M™ sanding discs come in a variety of forms to fit various power tools and disc pads. These high-quality abrasive products come ready to use with a pressure sensitive adhesive coating on the backside so they conveniently press on to a backup pad or hand pad, and remove cleanly, leaving an uncontaminated surface for the next sheet or disc.