3M™ Trizact™ Hookit™ 443SA foam-backed abrasive disc

3M Trizact Hookit 443SA is a foam-backed abrasive disc for paint finishing. It removes fine sanding scratches before polishing and shortens buffing time, replacing part of the polisher's work with a lighter random orbital sander.

Specifications

• Technology: 3M Trizact structured abrasive on foam backing.
• Attachment: Hookit hook-and-loop.
• Grits: P1000, P3000, P5000, P6000 and P8000.
• Diameters: 75 and 150 mm.
• Use: wet.

The Trizact principle

The grain is moulded into small identical pyramids. As each one wears, it exposes a fresh layer of grain: the scratch stays the same from the beginning to the end of the disc's life. In paint finishing, this consistency avoids isolated scratches that would reappear during polishing.

A typical sequence

After removing the defect (dust nib, run), refine with P1000 then P3000. P5000 or P6000 then refines the P3000 scratches, and P8000 leaves a surface almost ready to shine. The final polish then only has to remove a very fine scratch: it is shorter and heats the clear coat less.

Always wet

3M recommends wet use: the disc lasts longer and clogs less than when dry. Spray a little water on the area, work flat with a random orbital sander, wipe and check.

The foam backing conforms to curves and spreads the pressure: the disc works evenly without digging in.

See also the 3M Hookit foam disc, our foam-backed discs and our polishing products.