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Alpha Sandpaper Discs - 4" & 5"
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At a Glance
Quick Decision Guide
Disc Size
4"
Abrasive
Silicon Carbide
Grit
80
Grit System
U.S. CAMI
Backing
Hook & Loop
Use Method
Wet or Dry
Primary Materials
Marble & Softer Natural Stone
Quantity
50 Discs
Why Choose This Product
Key Benefits
Wet Sanding Performance
Waterproof construction resists clogging when used wet
Versatile Application
Suitable for wet or dry sanding and polishing
Stone Compatibility
Silicon carbide abrasive works on marble and softer natural stone
Fast Disc Changes
Hook-and-loop backing simplifies grit changes during polishing
Multiple Grits
Available from #80 through #600 U.S. CAMI grit
Multi-Material Use
Also works on glass, metal, wood, Bondo, primer and paint
Product Information
Product Details
Specifications
Brand
Alpha®
Part Number
MP40080
UPC
749173440069
Product Type
Sandpaper Disc
Disc Size
4"
Grit
#80
Grit System
U.S. CAMI
Abrasive
Silicon Carbide
Backing
Waterproof Hook & Loop
Use Method
Wet or Dry
Wet Performance
Resists Clogging
Primary Materials
Marble, Travertine, Terrazzo & Onyx
Additional Materials
Glass, Metal & Wood
Additional Uses
Multi-Purpose Sanding of Bondo, Primer & Paint
Compatible Backer Pads
Alpha Standard Backer Pads & GV5000
Quantity
50 Discs
About This Product
Silicon Carbide Sandpaper for Stone Polishing
Alpha® Sandpaper Discs combine a silicon carbide abrasive with waterproof hook-and-loop backing for sanding and polishing marble and softer natural stone. Available in 4" and 5" diameters, the discs provide a practical abrasive system for fabrication, tile work, restoration, and other surface-finishing applications.
Wet and Dry Sanding Applications
The waterproof construction allows the discs to be used wet, where they resist clogging to extend abrasive life, while still allowing dry use when required. Alpha® Sandpaper is suited for marble, travertine, terrazzo, and onyx and can also be used for polishing glass, metal, and wood or multi-purpose sanding of Bondo, primer, and paint.
Hook-and-Loop Discs for Fast Grit Changes
The hook-and-loop backing allows quick disc changes when progressing through multiple grits during sanding and polishing. The discs are available in #80, #120, #240, #320, #400, #500, and #600 U.S. CAMI grits, along with assortment options, with each variant supplied in a box of 50 discs.
Backer Pad Compatibility and Final Polishing
Alpha® Sandpaper Discs can be paired with Alpha standard backer pads or the GV5000 backer pad. For applications requiring an additional high-gloss finishing step, Alpha recommends completing the polishing process with an Alpha Felt Wheel and buffing compound.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What materials can Alpha Sandpaper Discs be used on?
Alpha® Sandpaper is primarily intended for marble and softer natural stone, including travertine, terrazzo, and onyx. It can also be used on glass, metal, and wood and for multi-purpose sanding of Bondo, primer, and paint.
Can Alpha Sandpaper Discs be used wet or dry?
Yes. The waterproof discs can be used wet or dry. Wet use helps resist clogging and can extend the usable life of the abrasive.
What grit sizes are available?
Individual discs are available in #80, #120, #240, #320, #400, #500, and #600 grits using the U.S. CAMI grit system. Assortment options are also available.
What sizes are Alpha Sandpaper Discs available in?
The discs are available in 4" and 5" diameters, with each listed variant supplied in a quantity of 50 discs.
What type of backing do the discs use?
The discs use waterproof hook-and-loop backing for quick attachment and removal when changing grits during sanding or polishing.
What backer pads can be used with Alpha Sandpaper?
Alpha recommends using the discs with its standard backer pads or the GV5000 backer pad.