The Simpson Adhesive Retaining Cap for 1 in. Rod is a plastic cap engineered by Simpson to simplify overhead, upwardly inclined, and horizontal adhesive anchor installations by keeping adhesive contained within the drilled hole throughout the installation process. By centering the threaded rod or rebar dowel during insertion, it supports precise anchor placement in demanding applications - including deep embedments where alignment is critical. Compatible with any Simpson anchoring adhesive, it can also be used in conjunction with the Simpson Piston Plug Delivery System for a complete, controlled injection workflow.

Key Features

• Slit design allows rod or rebar to pass through while sealing adhesive inside the hole - keeps adhesive where it belongs during insertion, reducing waste and mess on the job site
• Centers the threaded rod or rebar dowel during insertion - ensures accurate, consistent anchor placement, which is especially important in precision-critical structural applications
• Designed for overhead, upwardly inclined, and horizontal orientations as well as deep embedments - gives you a single solution that performs reliably across the most challenging installation angles
• Compatible with any Simpson anchoring adhesive - works seamlessly across the full Simpson adhesive anchor product line without requiring a specific formula
• Compatible with the Simpson Piston Plug Delivery System - integrates into a complete controlled-delivery workflow for cleaner, more consistent adhesive injection

Why This Product

• Solves the hardest part of overhead and horizontal installs - adhesive retaining caps prevent the adhesive from running out of the hole before the anchor cures, a common problem in non-vertical installations that can compromise bond strength
• Built-in centering improves anchor accuracy - the cap automatically centers the rod or rebar in the drilled hole, reducing the risk of off-center embedment and the rework that follows
• Broad application coverage in one simple accessory - whether the installation is overhead, angled upward, horizontal, or involves deep embedment, this cap is specifically designed to handle all of those conditions
• Flexible adhesive compatibility keeps workflow simple - because it works with any Simpson anchoring adhesive, contractors are not locked into a single product pairing, making it a practical fit for varied project requirements

Specifications

• Manufacturer Part Number (MPN): ARC100-RP25
• Hole Diameter: 1-1/8 in.
• Drill Bit Diameter: 1-1/8 in.
• Bolt / Rod Diameter: 1 in. / #8 Rebar
• Material: Plastic
• Packaging: Packs of 25 and Cartons of 200
• Country of Origin: United States

Approved Applications

• Overhead anchor installations where adhesive must be retained in the hole during cure
• Upwardly inclined anchor installations requiring adhesive containment
• Horizontal adhesive anchor installations
• Deep embedment applications requiring precise rod or rebar centering
• Use in conjunction with the Simpson Strong-Tie Piston Plug Delivery System

Frequently Asked Questions

What is the purpose of the slit in the Simpson ARC100-RP25 retaining cap?

The slit in the cap allows the threaded rod or rebar dowel insert to pass through the cap while still containing the adhesive within the drilled hole, preventing it from running out during installation.

Can the ARC100-RP25 be used to support the weight of the anchor during overhead installations?

No. Adhesive retaining caps are not designed to support the weight of the anchor. For overhead installations, it is advisable to provide an adequate means of anchor support during the adhesive cure time.

What anchoring adhesives are compatible with the ARC100-RP25 retaining cap?

The ARC100-RP25 works with any Simpson Strong-Tie anchoring adhesive, offering broad compatibility across the Simpson Strong-Tie adhesive anchor product line.

Can the ARC100-RP25 be used with the Simpson Strong-Tie Piston Plug Delivery System?

Yes. ARC adhesive retaining caps may be used in conjunction with the Simpson Strong-Tie Piston Plug Delivery System, making them a versatile component in a complete adhesive anchor installation setup.

Note: Adhesive retaining caps are not designed to support the weight of the anchor in overhead installations. It is advisable to provide an adequate means of anchor support during cure time for all overhead applications.