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The 3M 7000045589 is a Hookit 360L coated abrasive film disc designed for fine sanding and finishing work on plastics, gel coats, fiberglass, composites, and polyurethane solid surface substrates. It uses an aluminum oxide abrasive grain bonded to a durable film backing, which resists edge tearing and holds up in high-production environments better than standard A-weight paper-backed discs. The open coat construction helps prevent loading, keeping the disc cutting aggressively through multiple passes. At 5 inches in diameter and rated to 12000 RPM, this disc suits both portable and stationary random orbital applications.
This disc is built for trade and production use in body shops, marine fabrication, composite finishing, and millwork where a consistent, close-tolerance surface finish is required on non-metallic substrates. The Hookit attachment system allows fast disc changes and supports reuse of the disc over its full service life, reducing downtime on high-volume finishing lines. It is well suited for intermediate and finish sanding passes on gel coat panels, fiberglass layups, painted composites, and rigid polyurethane surfaces.
Designed for use with 5-inch Hookit hook-and-loop backup pads on random orbital and rotary sanders commonly used in composite, marine, and body shop finishing applications.
Install by pressing the disc firmly onto a compatible 5-inch Hookit backup pad until the hook-and-loop interface is fully engaged. Inspect the disc and backup pad for damage before each use. Do not exceed the rated 12000 RPM maximum speed. Operators should wear appropriate respiratory protection and eye protection when sanding composites, gel coats, or fiberglass materials.
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