The Lennox 18D44 (Boss 12513) Multi-Seal 125 is a high-performance building and construction sealant designed for long-lasting adhesion on metal, HVAC components, PVC, masonry, and wood. This aluminum-colored formulation provides durable weather resistance, UV stability, and flexible sealing for indoor and outdoor applications. Its low-odor, non-shrinking composition ensures a clean, professional finish for installers working on ductwork, joints, seams, and general sealing tasks.

 

Technical Specifications:

• Model: Boss 12513 Multi-Seal 125
• Color: Aluminum
• Cartridge Size: 10 ounces
• Application: Building, construction, HVAC sealing
• Properties: UV resistant, flexible, non-shrinking, weatherproof
• Compatible Materials: Metal, PVC, masonry, wood, fiberglass