Marshalltown 16440 Rub Brick 20 Grit 6x3 Inch Silicon Carbide

Product Description

The MARSHALLTOWN 16440 is a fluted silicon carbide rub brick designed for dressing down concrete surfaces and removing form marks left after stripping formwork. Measuring 6 inches by 3 inches with a 20-grit abrasive surface, it delivers aggressive material removal on cured concrete without the need for power tools. The fluted face design reduces glazing and keeps the working surface cutting efficiently throughout the job. Masons, flatwork finishers, and concrete restoration contractors keep this tool on hand for fast, controlled surface prep work.

This rub brick is used in residential and commercial concrete finishing applications where surface irregularities, bug holes, or form-release residue must be knocked down before coating, sealing, or tiling. It performs well on poured-in-place walls, precast panels, concrete block, and similar cementitious substrates. The tool is hand-operated, requiring no electricity or compressed air, making it practical for tight areas and field repairs where powered equipment is not accessible.

Key Features

• Fluted silicon carbide stone face for efficient, self-clearing abrasive action
• 20-grit coarseness suited for aggressive stock removal and form-mark elimination
• 6 inch by 3 inch footprint provides a broad working surface for faster coverage
• No power source required — fully hand-operated for use anywhere on site
• Solid one-piece construction withstands the abrasive demands of concrete finishing work

Compatibility

Designed as a standard hand rub brick for use on cured concrete, concrete block, precast panels, and similar cementitious surfaces requiring surface dressing or form-mark removal.

Installation Notes

This tool is used by masons and concrete finishers and requires no installation in the traditional sense. Wear appropriate personal protective equipment including eye protection and gloves, as silicon carbide abrasion generates fine silica-containing dust. Work in a well-ventilated area and follow applicable OSHA silica dust exposure guidelines. Wet the surface or the brick periodically to reduce airborne dust and extend abrasive life.

Technical Specifications

• Length: 6 inches
• Width: 3 inches
• Grit: 20
• Abrasive Material: Silicon Carbide
• Face Style: Fluted
• Weight: 10 pounds
• Unit of Measure: EA
• Package Quantity: 5

Standard Information

• Brand: MARSHALLTOWN
• Manufacturer Part Number: 16440