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In observance of Memorial Day, we will be closed on Monday, May 27th. We will reopen Tuesday, May 28th.

Black Diamond 400 Grit Red Concrete & Natural Stone Floor Prep Pads (12" - 28" Round) - Case of 2

Original price $84.99 - Original price $253.99
Original price
$84.99 - $253.99
Current price $84.99
Special Order ItemExpected to ship in 1 – 3 wks
2 Pads per Case
Quantity Discounts
5% off
10% off
15% off

Product Description

These 400 grit red Black Diamond floor prep pads are constructed to be used for heavy-duty cleaning and should be used on worn concrete floors. The pad will effectively remove scratches and stains, thus leaving a nice matte surface. They are typically used for the beginning steps of light honing and restoration in prep for using the 800 grit white, 1500 grit yellow, and 3000 grit green Black Diamond pads. Due to the abrasiveness of this pad, the red pad should only be used with water at low speeds (up to 350 RPMs).

The Black Diamond pads provide an innovative solution to cleaning your floor while reducing waste and saving you money. They can be used on a wide range of floors, including polished concrete, terrazzo, marble, limestone, travertine, VCT, and more. Built with billions of microscopic diamonds, these pads clean and polish floors at the same time. They require no harsh chemicals while buffing and typically are used with water depending on the pad and the speed of the machine. When used daily, the pads will give the floor a mechanically densified surface that will create resistance to dirt and wear while increasing slip resistance.

When using Black Diamond pads, they require no additional equipment and can be used with your current floor buffer or floor scrubber. Because you no longer need chemicals to strip and buff your floors, you can potentially save up to 66% on your consumable spending.

These 400 grit red pads are part of a starter pack, which comes with all the different Black Diamond pads that one should use during this restoration process. If you own a rectangular buffer or scrubber, look to our rectangular Black Diamond 400 grit red pads. For a complete rundown of when to use each specific pad, please view our Black Diamond Pad Guide page.


  • No chemicals are needed, scrubbing should be done with water only.
  • Built with billions of microscopic diamonds that clean & polish the floor at the same time.
  • 400 grit red pads effectively remove scratches & stains, leaving a clean, matte surface.
  • Pads fit current machines on the market without the need for new equipment.
  • When performing daily maintenance at low speeds, Black Diamond Pads cover +/- 500,000 ft² of flooring per pad.
  • Pads should only be used colored side down only & replaced when the backing starts to show through.

Pad Characteristics

Pad Life Estimates
Pad Life Estimate
Black Diamond Pads at Low Speed
Size Square Feet Per Pad
6.5 inch 81,250 ft²
10 inch 125,000 ft²
12 inch 150,000 ft²
13 inch 162,500 ft²
14 inch 175,000 ft²
15 inch 187,500 ft²
16 inch 200,000 ft²
17 inch 212,500 ft²
18 inch 225,000 ft²
20 inch 250,000 ft²
21 inch 262,500 ft²
24 inch 300,000 ft²
27 inch 337,500 ft²
28 inch 350,000 ft²
For a complete rundown of estimates for different pad type and sizes,
please view our Floor Pad Life Expectancy Estimates page.

Quick Overview

  • Available in 12" - 28" sizes
  • 2 - 400 grit round pads per case
  • For use on floor machines up to 350 RPM

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Black Diamond Polishing Pads

Product Information + Specs

Manufacturer Sku
Brush/Pad Shape
Country of Manufacture
United States
Product Type
Floor Pads, Bonnets & Sanding Screens

Safety, Warranty + User Manuals

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