Collection: Sanding Disc

The sanding disc covers everything that comes after roughing: surface preparation, scuffing, matting before painting and finishing. The catalogue has 22 references, grouped by backing, because the backing determines what the disc is for.

By backing type

• Paper backing: Indasa Rhynogrip Redline, Mirka Gold, Q.Silver and Iridium, 3M Hookit 255P, Grit. Gold. Economical and even.
• Cloth backing: 3M Cubitron II Hookit 900DZ, Trizact 237AA. Tear-resistant and suited to wet work.
• Film backing: 3M Cubitron II 775L, Dynabrade DG922. Very constant thickness, for fine grits.
• Mesh backing: Mirka Abranet and Autonet, 3M Xtract 310W and 710W. Extraction across the whole surface.
• Foam backing: Mirka Abralon, 3M Trizact Hookit 443SA, 3M Hookit 600A. Follows shapes.

The question of hole patterns

On a dust-extracting disc, dust only escapes through the holes, and the pad must have the same ones. A 15-hole disc fitted to a 6-hole pad only extracts through six points: the abrasive clogs, the surface gets scratched and the disc lasts half as long.

Three answers exist. Match disc and pad, which means storing them together. Use a universal multi-hole pad. Or switch to mesh backing, open everywhere, which removes the question.

Grit: progression rather than jumps

Each pass must remove the scratches of the previous one. Skipping more than one step in the sequence means working much longer for a less even result. P80, then P120, then P180 is faster than P80 followed directly by P180.

In preparation before painting, the last grit determines what will show under the paint. A grit that is too coarse leaves scratches that the paint reveals instead of hiding, a grit that is too fine does not give enough key.

Pressure, the main source of waste

An abrasive that cuts does so with the weight of the machine. Pressing harder does not remove more material, it heats the resin, sticks dust between the grains and turns a new disc into a smooth one in seconds.