Description
The Lochinvar & A.O. Smith 100146588 is an OEM adhesive-backed gasket designed to deliver dependable sealing performance in boiler and hydronic heating applications. Measuring 1/4″ thick by 5/8″ wide and supplied in a 25-foot length, this gasket provides a continuous, flexible seal that helps prevent heat loss, combustion gas leakage, and water intrusion at critical joint and access panel interfaces.
Manufactured to Lochinvar and A.O. Smith specifications, this adhesive gasket is the correct factory replacement for equipment requiring part number 100146588. The pressure-sensitive adhesive backing allows for fast, precise installation without the need for additional adhesives or fasteners, ensuring a consistent, gap-free seal every time.
Key Features
- OEM part number 100146588 — direct factory replacement
- Dimensions: 1/4″ thick x 5/8″ wide x 25 feet long
- Adhesive backing for quick, secure installation
- Designed for boiler and hydronic heating system sealing applications
- Flexible construction conforms to mating surfaces for a reliable, gap-free seal
- Compatible with Lochinvar and A.O. Smith boiler equipment
Application
This adhesive gasket is ideal for sealing access panels, doors, and joint interfaces on Lochinvar and A.O. Smith boilers. Its 25-foot roll provides ample material for single or multiple service calls, making it a practical addition to any HVAC technician’s parts inventory.







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