Mirka Waterproof Finishing Sheets Mirka Waterproof is a wet sanding paper for hand sanding of plastics, lacquers and composites. Technical specifications | Grain | P 80 – P 360 aluminium oxide, P 400 – P 2000 silicon carbide | | Bonding | Resin over resin
| | Backing | P 80 – P 120 C-weight paper, P 150 – 2000 B-weight paper
| | Coating | Closed | | Colour | Black | | Grit range | P 80, 100, 120, 150, 180, 220, 240, 320, 360, 400, 500, 600, 800, 1000, 1200, 1500, 2000
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