1 Lbs. Duct Seal Putty, Slug Box, Gray, Thumbable

MARS 93520 Duct Seal Putty – 1 lb Slug Box, Dark Gray

The MARS 93520 Duct Seal Putty is a professional-grade, non-hardening sealing compound formulated for use in HVAC, electrical, refrigeration, and plumbing applications. This pliable, reusable compound is designed to provide an airtight and watertight seal around penetrations, junction boxes, conduit entries, and tubing openings. Manufactured to maintain flexibility and adhesion under variable temperature and environmental conditions, MARS duct seal offers long-term performance without drying, cracking, or shrinking, ensuring effective mechanical sealing in both indoor and outdoor installations.

Technical Specifications

• Manufacturer: MARS
• Product Name: Duct Seal Putty
• Part Number: 93520
• Packaging Type: Slug Box
• Package Weight: 1 lb (0.45 kg)
• Form: Solid, Hand-Moldable Compound
• Color: Dark Gray
• Texture: Thumbable / Non-Hardening
• Specific Gravity: 1.78 g/cc
• Flash Point: 310°F (COC)
• Flammability Rating (HMIS): 0
• Toxicity: Non-Toxic
• Composition: Non-asbestos, non-corrosive sealing compound
• Temperature Range: Stable under normal HVAC, refrigeration, and electrical service conditions
• Reusability: Reusable after removal; maintains pliability and seal integrity
• Adhesion: Adheres to metal, plastic, masonry, and wood surfaces
• Weather Resistance: Airtight and watertight seal; resistant to moisture and temperature variation
• Application Method: Hand-applied; requires no tools or curing
• Applications: Electrical junction box sealing, refrigeration tubing penetrations, foundation wall openings, and conduit entries
• Compliance: Meets professional trade requirements for non-hardening sealing materials

Performance and Application

The MARS 93520 Duct Seal Putty is engineered to deliver long-term sealing reliability across electrical, HVAC, and plumbing installations. Its non-hardening composition allows for continuous flexibility, ensuring seals remain intact even when subject to vibration, minor movement, or temperature changes. The compound’s high adhesion properties enable it to bond securely to a variety of substrates, including galvanized steel, copper, PVC, and masonry. It effectively prevents air leakage, moisture infiltration, and dust intrusion, making it suitable for use in both indoor control panels and exterior service penetrations. The 1 lb slug box format provides a convenient, manageable quantity for field service technicians and small-scale installations.

Summary

The MARS 93520 Duct Seal Putty provides professional contractors with a versatile, non-hardening sealing compound for HVAC, electrical, and refrigeration systems. Its thumbable, reusable consistency, superior adhesion, and long-term durability make it ideal for sealing conduit entries, tubing penetrations, and junction box openings in both commercial and residential applications.