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 X62V 6" (152mm) Dia. Central-Vacuum Dynorbital Extreme Random Orbital Sander, .3 HP, 12,000 RPM, 3/32" Orbit, Hook-Face
Dynabrade 18653 E-Ring
Dynabrade 52851 Extension Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
Dynabrade 79052 3" W x 24" L 80 Grit A/Z DynaCut Belt, 10/pack
Dynabrade X61 6" (152 mm) Dia. Non-Vacuum Dynorbital Extreme Random Orbital Sander, .3 HP, 12,000 RPM, 3/16" Orbit, PSA
Dynabrade 91256 8" Dia. x 180 Grit A/O Vacuum Hook-Face DynaCut Disc, 25/Box
Dynabrade 91744 DynaMesh 8" 320 Grit Hook & Loop Discs, 50 per box
Dynabrade 91253 8" Dia. x 220 Grit A/O Non-Vacuum Hook-Face DynaCut Disc, 25/Box
Dynabrade 11663 Dynabelter Contact Arm Assembly 1 Inch Dia x 1 Inch W, 80 Durometer Wheel
Dynabrade 56321 6" Dia. Vacuum Disc Pad, Hook-Face, 52 Holes
Dynabrade 59035 5" Dia. Non-Vacuum Dynorbital-Spirit Random Orbital Sander, 3/32" Orbit
Dynabrade 51753 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 50,000 RPM, 1/8" Collet
Dynabrade 11213 Contact Arm Ass'y, 5/16" Dia. x 3/8" W, Steel Wheel, with 1/2" W Platen 
