3M 7000118492 Hookit 360L Film Disc 3 Inch P400 Grit

Product Description

The 3M 7000118492 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. The disc uses aluminum oxide abrasive grain bonded to a durable film backing rated for high-production use. At 3 inches in diameter with a P400 grit rating, it delivers a close-tolerance, consistent finish. The film backing resists edge tearing and outlasts standard A-weight paper-backed discs in demanding production environments. Installers and finishing technicians in marine, automotive, and composite fabrication trades rely on this disc for controlled material removal at fine grits.

This disc is suited for surface preparation and finish sanding on composites, gel coats, fiberglass, and other solid surface materials in both shop and production settings. The Hookit attachment system allows fast disc changes without tools, reducing downtime during high-volume sanding operations. Open coat construction minimizes loading when working with softer or resin-rich substrates, maintaining cut rate across the disc life. It is sold individually and is compatible with Hookit backup pads sized for 3-inch discs.

Key Features

• Aluminum oxide abrasive grain provides fast cut rate and extended service life across a range of surface materials
• Durable film backing resists edge tearing for longer disc life compared to standard A-weight paper backings
• Open coat construction reduces loading and maintains aggressive cut on resins, gel coats, and composites
• Hookit attachment system enables fast, tool-free disc changes and allows disc reuse
• P400 grit delivers fine finish results suitable for final sanding passes on sensitive substrates
• Rated to 20000 RPM for use with compatible high-speed random orbital and disc sanders

Compatibility

Designed for use with 3-inch Hookit backup pads and compatible random orbital or disc sanders accepting the Hookit hook-and-loop attachment system.

Installation Notes

This disc is installed and removed by hand using the Hookit hook-and-loop system — no tools required. Verify that the backup pad diameter matches the 3-inch disc before use. Do not exceed the 20000 RPM maximum speed rating. Inspect the disc and backing pad for damage before each use and replace if abrasive is worn, loaded, or the film backing shows tears.