Lennox 18D50 – Boss 37008, 370 HVAC Silicone Sealant, Clear, 8 Ounce Pressurized Can

This clear Boss 370 HVAC silicone sealant is designed for professional-grade sealing and bonding across heating and cooling systems. The 8 ounce pressurized can provides smooth, controlled application for sealing joints, seams, and penetrations on furnaces, air handlers, ductwork, and equipment housings. Its flexible, moisture-curing formula helps prevent air leakage, moisture intrusion, and vibration-related separation in residential and light commercial HVAC installations.

Features and benefits
• Clear silicone sealant formulated for HVAC system sealing and bonding
• Ideal for ductwork seams, flue connections, access panels, and equipment penetrations
• Provides long-lasting flexibility and resistance to thermal expansion and vibration
• Moisture-curing formula adheres to metal, aluminum, galvanized surfaces, and plastics
• Suitable for indoor and outdoor use in conditioned and unconditioned spaces
• Pressurized 8 ounce can allows precise application with reduced waste

Additional details
• Color: Clear
• Container size: 8 ounce pressurized can
• Typical applications: furnaces, air handlers, plenums, rooftop units, duct transitions
• Designed for sealing gaps to support system efficiency and air-tight performance

This Lennox 18D50 replacement Boss 37008 sealant provides reliable adhesion for maintenance, repair, and installation tasks where durable, flexible sealing is required. Suitable for contractors and homeowners performing HVAC system sealing and weather protection.

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