The Simpson ETB4 Nylon Hole-Cleaning Brush is a purpose-built accessory from Simpson designed to thoroughly clean drilled holes before adhesive anchor installation. Its twisted wire handle and nylon bristles work together to clear debris and dust from the hole interior, helping to promote a strong, reliable bond when dispensing Simpson adhesives such as SET-XP, AT-XP, and ET-HP. Whether you are setting anchor rods or bolts in concrete or masonry, proper hole preparation starts with the right brush for the job.

Key Features

• Twisted wire handle with nylon bristles for strength - delivers firm, consistent scrubbing action so debris is fully cleared before adhesive is applied, reducing the risk of weak or failed anchor bonds.
• Compatible with holes from 3/8 in. to 7/16 in. in diameter - accommodates anchor rod and bolt diameters of 1/4 in. to 5/16 in., covering a practical range of common fastener sizes in a single brush.
• Sturdy and reusable construction - withstands repeated use across multiple hole-cleaning applications, keeping per-job cost low without sacrificing cleaning performance.
• 7 in. useable length - provides sufficient reach into drilled holes to clean the full depth needed for a properly prepared anchor seat.

Why This Product

• Engineered to work directly with Simpson adhesive systems - specifically designed for use with SET-XP, AT-XP, and ET-HP adhesives, so the brush geometry and bristle type are matched to the hole preparation requirements those products demand.
• Reusable and built to last - the sturdy twisted wire handle resists bending and deformation during vigorous scrubbing, meaning one brush handles many installations without needing frequent replacement.
• Right-sized for precision anchor work - the 3/8 in. to 7/16 in. hole diameter range keeps the brush snug against hole walls for thorough debris removal, which is critical to achieving full adhesive contact and proper load transfer.
• Simplifies the anchor installation workflow - pairing this cleaning brush with compatible Simpson adhesive dispensing tools keeps the entire process consistent and efficient from drilling through dispensing.

Specifications

• MPN: ETB4
• Useable Length: 7 in.
• Actual Length: 8 in.
• Hole Diameter: 3/8 in. to 7/16 in.
• Bolt/Rod Diameter: 1/4 - 5/16 in.
• Install With: SET-XP, AT-XP and ET-HP
• Country of Origin: United States

What's Included

Each pack contains (1) ETB4 Steel Hole Cleaning Brush, Brush with twisted wire handle.

Frequently Asked Questions

What is the ETB4 brush used for?

The ETB4 brush is used for cleaning drilled holes prior to adhesive anchor installation. Proper hole cleaning helps ensure a strong bond when dispensing Simpson Strong-Tie adhesives.

What hole diameters is the ETB4 compatible with?

The ETB4 can be used in holes ranging from 3/8 in. to 7/16 in. in diameter, making it suitable for anchor rod and bolt diameters of 1/4 in. to 5/16 in.

Which Simpson Strong-Tie adhesives is the ETB4 designed to be used with?

The ETB4 is designed for use in conjunction with Simpson Strong-Tie adhesives, and is specifically compatible with SET-XP, AT-XP, and ET-HP adhesive systems.

Is the ETB4 brush reusable?

Yes. The ETB4 features a sturdy twisted wire handle with nylon bristles, making it durable and reusable across multiple hole-cleaning applications.

Related Products

• ET-3G