Hoffman AS250 Hol-Sealer Enclosure Hole Seal, Painted Galvanized Steel

Hoffman AS250 Hol-Sealer Hole Seal for Enclosure Wire Openings

The Hoffman AS250 Hol-Sealer is a purpose-built hole seal designed to close and protect unused or wire-pass-through openings in electrical enclosures. Constructed of painted galvanized steel, the AS250 gives panel builders and electricians a fast, reliable way to seal a cutout or knockout without welding, patching, or replacing an enclosure panel. This Hol-Sealer is available in two hole sizes — 2-1/2" and 3/4" — so the correct seal can be matched to the specific opening left in an enclosure or panel. As a purpose-built accessory, the AS250 helps maintain the mechanical integrity and internal cleanliness of an enclosure once a hole has already been cut or is no longer needed for a conductor run.

Key Features

• Hole Size Range: Available in 2-1/2" and 3/4" sizes to match the specific unused opening or knockout being sealed.
• Painted Galvanized Steel Construction: Built from painted galvanized steel for durable, corrosion-resistant performance in industrial and commercial enclosure environments.
• Hoffman Hol-Sealer Design: Purpose-built as a hole seal for closing openings in electrical enclosures and panels, part of Hoffman's recognized Hol-Sealer product family.
• Enclosure Protection: Helps seal off unused conduit, cable, or wire openings to support a cleaner, more contained enclosure interior.
• Simple Field Installation: Designed for straightforward installation into an existing hole or knockout, reducing the need for panel replacement or metal fabrication rework.
• Model AS250 Identification: Clearly identified under the Hoffman AS250 designator, making it easy to reference and reorder for maintenance or retrofit projects.
• Compatible with Standard Enclosures: Intended for use with the metal enclosures and panel systems commonly found in industrial and commercial electrical installations.

Technical Specifications

• Hole Size Options: 2-1/2", 3/4"
• Material: Galvanized Steel
• Finish: Painted
• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Sealing Unused Conduit or Wire Openings in Electrical Enclosures
• Retrofit and Maintenance Projects on Existing Panels
• Industrial and Commercial Electrical Enclosure Upkeep
• Panel Modification Following Wiring Changes
• General Enclosure Housekeeping to Maintain a Contained Interior

Why Hoffman?

Hoffman is a long-established name in electrical enclosure and panel accessories, and the Hol-Sealer line reflects that same focus on practical, install-ready solutions for the electrical trade. Choosing the Hoffman AS250 hole sealer, offered in 2-1/2" and 3/4" sizes with painted galvanized steel construction, gives contractors and maintenance teams a dedicated, brand-name component for closing enclosure openings rather than improvising with generic materials. For enclosure upkeep, panel modifications, and retrofit work, the Hoffman AS250 offers a straightforward way to keep enclosures properly sealed and protected against dust, debris, and unwanted intrusion.