3M 7000120476 Marine Grade Silicone Sealant White

Product Description

The 3M 7000120476 is a marine grade silicone sealant formulated for use in harsh saltwater and freshwater environments. It comes in white and is packaged in a standard 1/10 gallon cartridge for use with a caulking gun. The sealant cures to a flexible, mildew-resistant seal that resists yellowing even after extended exposure to UV, moisture, and temperature cycling. It is well suited for sealing joints, seams, and penetrations where long-term flexibility and weather resistance are required. Installation is typically performed by marine technicians, contractors, or experienced service professionals working on boat hulls, decks, fittings, and trim.

This sealant is intended for marine applications where a durable, flexible seal is needed against water intrusion, UV degradation, and mildew growth. Typical uses include sealing around deck hardware, hatches, ports, through-hull fittings, and other joints subject to movement and prolonged moisture exposure. It is also suitable for use in coastal construction and other outdoor environments where silicone performance is required.

Key Features

• Formulated for harsh marine environments including saltwater exposure
• Mildew-resistant cure resists growth over time
• Non-yellowing formula maintains appearance after UV exposure
• Remains flexible after years of service — accommodates joint movement
• White color suits common marine and coastal applications
• 1/10 gallon cartridge is compatible with standard caulking guns

Compatibility

Designed as a general-purpose marine grade silicone sealant suitable for use on fiberglass, metal, glass, and other common marine substrates where a flexible, waterproof seal is required.

Installation Notes

Application should be performed by a qualified marine technician or contractor following standard sealant procedures. Surfaces must be clean, dry, and free of old sealant, grease, and debris before application. Allow adequate cure time before exposing the seal to water or mechanical stress. Follow all applicable safety data sheet guidance when handling silicone sealants in enclosed spaces.

Technical Specifications

• Weight: 0.83 pounds
• Package Size: 1/10 gallon cartridge
• Color: White
• Unit of Measure: Each
• Minimum Order Quantity: 12
• UPC: 00051135080276

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120476