Extra Fine and Indispensable
Few shops can do without abrasives in handy sheet form, and our 3M Paper Sheet 405U is built to be indispensable. A flexible A-weight paper backing provides excellent conformability and silicon carbide abrasive mineral delivers exceptional finishes.
Our silicon carbide abrasive sheets create a smoother finish than aluminum oxide products on most substrates. While it breaks down faster than aluminum oxide, it produces a superior finish. A resin bond construction provides superior grain retention while the open coat construction, along with the load-resistant coating, combine to provide excellent anti-loading characteristics.
These versatile sanding sheets contain the ideal abrasive grain type and grades for multi-step finishing processes.
Paper Backing for Conformability to Contours
The light A-weight backing provides conformability over contours and into crevices and corners. The sheet can also be easily cut to fit a hand pad block, inline sander, or finishing or power sanders. Other applications include general sanding, finishing, blending, surface leveling, prep prior to staining/painting and scuff sanding between coatings.
Recommended Applications
Silicon carbide is a synthetic mineral that is very sharp and commonly used for final finishing in white wood sanding.
It is ideal for general purpose sanding on wood, metal, plastic, dry wall, fiberglass, glass and ceramic materials as well as contour blending.

Dynabrade 13504 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 3,400 RPM, 5/8"-11 Threaded Arbor
Dynabrade 51348 2" Dia. Locking-Type Disc Pad, Medium Density, 1/4"-20 Thread
Dynabrade 01435 Collet Body
Dynabrade 57814 3-2/3" W x 7" L Dynabug Orbital Sander, Central Vacuum, .28 HP, 10,000 RPM, 3/32" Orbit
Dynabrade 78116 3/4" W x 34" L Medium NWN DynaBrite Belt, 10/pack
Dynabrade 78571 1-1/2" Dia. x 8-32 Female Center Thread, 60 Grit, A/O, 3-Ply, J-DynaCut Eyelet Star, 50/pack
Dynabrade 15368 Contact Arm Assembly, 1" Dia. X 1" W, Serrated Wheel
Dynabrade 56759 .7 hp Straight-Line Die Grinder, Central Vacuum, 15,000 RPM, 1/4" Collet
Dynabrade 52955 Trigger Ass'y
Dynabrade 48371 .4 hp Straight-Line Die Grinder, Rear Exhaust, 25,000 RPM, 1/4" Collet
Dynabrade 50014 3/8" (.375) Capacity Collet Sleeve
Dynabrade 40378 Rubber Drive Wheel, Mini Dynafile II
Dynabrade 56158 6" Dia. Non-Vacuum Disc Pad, Hook-Face, Short Nap
3M 60332, Scotch Fire-Retardant Electric Arc Proofing Tape 77, 1-1/2 in x 20 ft, Black, 7100004537
Dynabrade 01024 O-Ring
Dynabrade X61V 6" (152 mm) Dia. Central-Vacuum Dynorbital Extreme Random Orbital Sander, .3 HP, 12,000 RPM, 3/16" Orbit, Hook-Face 
