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  • 3M Cubitron™ II 34442 737U Series Multi-Hole Clean Sanding Sheet Roll, 70 mm W x 12 m L, 80+ Grit - part 34442
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3M Cubitron II Hookit Clean Sanding Sheet Roll 737U, P40 to P400

34442

$54.99
$67.82 $54.99
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Specifications

Part number
34442
Brand
3M
Product line
737U
Sold as
Roll
Grit
80+
Abrasive mineral
Precision Shaped Ceramic
Backing
Paper
Size
2.76 in × 13.12 yd
Attachment
Hook & Loop
Wet or dry
Dry
UPC
051131344426

Use it for

  • Filler Shaping
  • Hand Sanding
  • Paint Sanding
  • Primer Sanding
  • Rough Feather Edge
  • Sanding
  • Sanding Filler
  • Shape and Sand Filler or Putty

Works on

  • Clear Coat
  • Filler
  • Paint
  • Putty

3M's precision-shaped ceramic grain on a Hookit roll for hand blocks and file boards. The multi-hole Clean Sanding pattern pulls dust away, and kiss-cut scoring lets you tear off the sheet length your block needs.

Faster cut, at least (3M)
30%
Longer life, at least (3M)
30%
Roll length (P40: 8 m)
12 m
Rolls per case
5
Choose your grade

Where each grade fits (3M chart)

Grade Use Parts here
P40 / P80 Coarse sanding 34440, 34442 (70 mm); 35500 (80 mm)
P120–P180 Filler shaping and sanding 34444–34446 (70 mm); 35503, 35504 (80 mm)
P220 Filler final sanding 34447 (70 mm); 35505 (80 mm)
P240 Feather-edging 34448 (70 mm); 31488 (80 mm); 34468 (115 mm)
P320 / P400 Block sanding primer 34449, 34450 (70 mm)
Why it works

Sharper grain, less dust

  • Precision-shaped grain. Triangular ceramic grains, electrostatically oriented to cut.
  • Clean Sanding holes. A multi-hole pattern for dust extraction on a vacuum block.
  • Tear to length. Kiss-cut scoring gives you multiple sheet lengths from one roll.
  • Hookit. Hook-and-loop attachment for quick changes.
Put it on a dust-extraction block. 3M builds 737U to work as a system with its dust extraction blocks and equipment. The 67 mm 3M Hookit Dust Extraction Flexible Blocks match the 70 mm roll.
How to use

Block sanding

  1. Pick the roll width that matches your block.
  2. Tear the roll at the kiss-cut to the length your block needs.
  3. Mount the sheet on a Hookit block and connect dust extraction.
  4. Work through the grades: shape filler with P120–P180, finish with P220, feather-edge with P240.
  5. Block primer with P320–P400.
Specifications

Tech specs

Product 3M Cubitron II Hookit Clean Sanding Sheet Roll 737U
Mineral Precision-shaped ceramic grain
Attachment Hookit hook and loop
Hole pattern Clean Sanding multi-hole
Widths here 70 mm, 80 mm, 115 mm
Roll length 12 m; P40 rolls (34440, 35500) are 8 m
Pack 5 rolls per case
Pairs well with

Related

Quick answers

FAQ

How long is a roll?

12 m, except the P40 rolls (34440 and 35500), which are 8 m.

Does it work with dust extraction?

Yes. The Clean Sanding multi-hole pattern is made for dust extraction blocks.

Which blocks fit?

Match the width: 3M's 67 mm Hookit Dust Extraction blocks suit the 70 mm roll.

What grit for primer?

3M's chart puts P320 and P400 at block sanding primer.

What mineral is it?

3M Cubitron II precision-shaped ceramic grain.

Manufacturer documents: 737U brochure (PDF)3M Paint Shop Solutions Guide (PDF)