3M Paper Sheet 405U, 4 1/2 in x 5 1/2 in 320 A-weight, 400/Carton, 4000 ea/Case

• Fast cutting silicon carbide delivers exceptional finishes
• Great for contour sanding
• Light A-weight paper backing has excellent conformability
• Load-resistant coating and open coat construction minimize loading for better finish and longer abrasive life
• Silicon carbide is ideal for general purpose sanding on wood, metal, plastic, dry wall, fiberglass, glass and ceramic

3M Paper Sheet 405U is a silicon carbide sheet constructed on an A-weight, light paper backing. It features a load-resistant coating and open coat construction.

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.

Trusted 3M Paper Sheet

The 3M Paper Sheet 405U is a reliable choice for sanding needs. This model features a silicon carbide abrasive that delivers exceptional finishes, making it a top pick for professionals. Its A-weight backing ensures flexibility and excellent conformability during use.

Designed for versatility, this sheet is sized at 4 1/2 in x 5 1/2 in, fitting various sanding tools. The 405U model is built to provide consistent results across multiple surfaces, making it indispensable in many workshops.

Precise Size And Format

Measuring 4 1/2 in x 5 1/2 in, this paper sheet offers a convenient size for detailed sanding tasks. Its format as a sheet allows easy cutting and fitting to hand pads or power sanders, enhancing usability.

The sheet format supports contour sanding and finishing, making it ideal for projects requiring precision. This size and format combination ensures you can handle both broad and detailed sanding efficiently.

Lightweight A-weight Backing

The 320 A-weight paper backing provides excellent conformability, allowing the sheet to bend and flex over contours and into corners. This backing type supports smooth sanding on uneven surfaces without tearing.

This lightweight backing also helps reduce fatigue during extended sanding sessions. It’s perfect for general sanding, blending, surface leveling, and prep work before staining or painting.

Large Pack Count Advantage

Each carton contains 400 sheets, and the case includes 4000 sheets, ensuring you have plenty of material for ongoing projects. This pack size supports bulk purchasing, which is cost-effective for busy shops.

Having a large quantity on hand means less frequent reordering and uninterrupted workflow. The 400/Carton and 4000 ea/Case packaging suits both small businesses and larger operations.

Effective Abrasive Technology

The silicon carbide abrasive in the 3M Paper Sheet 405U is ideal for general purpose sanding on wood, metal, plastic, drywall, fiberglass, glass, and ceramic. It produces a smoother finish than aluminum oxide abrasives.

Its load-resistant coating and open coat construction minimize loading, extending abrasive life and improving finish quality. This technology supports multi-step finishing processes with superior grain retention.