Dura-Block AF44 Six-Piece Block Set
Six shapes for six situations. Nothing gets skipped. Nothing gets away.
Sponges
This lineup leans hardest into rust removal, auto-body, between coat scuffing, between-coat finishing. Start with the form, then narrow by grit and price tier.
Reviewed
8
Current picks in this form factor.
Common grit lanes
5
Relevant grit pages currently connected to this form.
Head to head
3
Comparison pages featuring this format right now.
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Starting points
Six shapes for six situations. Nothing gets skipped. Nothing gets away.
Soft on the outside. Firm when it counts. Rinses and comes back for more.
Soft on the outside. Firm when it counts. Rinses and comes back for more.
Squeezes into any contour, rinses clean, and comes back ready. Angled for corners. Not everything worth reaching for needs to be rigid.
Six shapes for six situations. Nothing gets skipped. Nothing gets away.
Six shapes that put the paper in direct contact with every contour on the panel. Everything gets the attention it deserves — nothing gets skipped.
Comes in heavy. Leaves the surface ready for whatever comes next.
Maroon runs ~120-grit equivalent — aggressive enough to scuff old finish, controlled enough not to destroy what's underneath. The opener in any surface prep sequence.
Two grits, one block. Reaches every profile a flat sheet walks past.
Conforms to every profile sheet sandpaper can't follow. Fine on one side, medium on the other. Rinse it and it comes back for another pass.
For the detail work that won't stand still for a sheet.
Small, shaped, and exact. Reach into corners, curves, and detail work that sheet sandpaper gave up on years ago.
European made. Reaches every detail the block passes over.
European made in shapes that reach model grooves and casting details. The stick that does the work the block can't see.
Green grit. The middle ground between maroon and gray.
Green runs ~80-grit equivalent. Aggressive scuffing without the aggression. Cleans up finishes that need respect.
Blue grit. Between coats. Never apologizes.
Blue runs ~220-grit equivalent. Fine enough for between coats, tough enough not to disappear mid-stroke.
Head to head
3M Angled Sanding Sponges (6-pack) — Wet or Dry vs. Drywall Pole Sander Kit — 81" + 15 Sheets (80–240 grit)
Two halves of the same drywall job.
Read the comparison →
3M Angled Sanding Sponges (6-pack) — Wet or Dry vs. Dura-Block AF44 Six-Piece Block Set
Conform to the contour, or flatten it.
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3M Scotch-Brite Maroon Heavy Duty Hand Pad (10-pack) vs. 3M Scotch-Brite Gray Ultra Fine Hand Pad (10-pack)
The opening scuff or the closing one.
Read the comparison →
Buyer questions
Choose sponges and pads when the surface curves, flexes, or gets wet and rigid paper keeps fighting you.
Sponges on UltraRough show up most often around rust removal, auto-body, between coat scuffing, and between-coat finishing. That is where this form earns its place.
Start with 60 grit, 80 grit, 100 grit, and 120 grit. Those are the numbers this form most often overlaps with in the current catalog.
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