3M™ Hookit™ 600A Foam Disc

The 3M Hookit foam disc is an abrasive disc bonded to a 12.7 mm layer of soft foam. Fitted to a disc sander, it conforms to shapes and lets you work close to edges without cutting into them.

Specifications

• Mineral: aluminium oxide.
• Backing: low-density foam, 12.7 mm.
• Attachment: Hookit hook-and-loop.
• Grits: fine and super fine.

What the foam changes

A paper disc fitted directly to a rigid pad works flat. On a curved surface it presses on the high points and creates flats. On an edge, the rim of the pad bites into the part as soon as the machine is tilted.

The foam absorbs these differences. The disc stays in contact with a curved surface, pressure is spread, and when the sander is tilted over an edge the foam compresses instead of cutting. 3M highlights this point: the disc reduces edge cutting while staying in close contact with the edge.

Uses

Finishing before painting, scuffing primer, sanding curved bodywork surfaces, preparing moulded or shaped parts. In super fine grit it is also used to matt a surface before bonding or touch-up.

Pad and extraction

The disc fits onto a standard Hookit pad or a Clean Sanding pad. With a perforated pad and a dust-extracting sander, it allows good dust removal, which prevents the grain from clogging and improves the evenness of the finish.

With a soft backing, light pressure is enough. Pressing too hard crushes the foam and cancels its advantage.

See also our foam-backed sanding discs, our sander pads and our 3M products.