3M 7000120479 Marine Grade Silicone Sealant White 3 Oz

Product Description

The 3M 7000120479 is a marine-grade silicone sealant formulated for use in demanding saltwater and freshwater environments. It cures to a flexible, mildew-resistant seal that resists yellowing over time, making it well suited for applications that see prolonged UV exposure, moisture, and temperature cycling. The sealant comes in a 3 oz tube and is available in white. It is used by marine technicians, boat builders, and maintenance professionals working on hull fittings, deck hardware, ports, hatches, and other wet or exposed surfaces.

This sealant is intended for marine applications where a durable, weatherproof, and non-yellowing silicone seal is required. Typical uses include sealing around through-hull fittings, deck plates, windshield trim, and other exterior joints on fiberglass, metal, and painted surfaces exposed to standing water, spray, and UV. It is appropriate for both recreational and commercial vessel maintenance.

Key Features

• Mildew-resistant formula suited for constant moisture exposure
• Remains flexible after curing — resists cracking from hull flex and vibration
• Non-yellowing formulation maintains appearance over extended UV exposure
• Convenient 3 oz tube for targeted application on fittings and seams
• White color matches common deck and hull finishes

Compatibility

Designed as a general-purpose marine-grade silicone sealant for use on fiberglass, metal, glass, and painted surfaces common to marine vessel construction and maintenance.

Installation Notes

Application is typically performed by marine technicians or experienced boat maintenance professionals. Surfaces should be clean, dry, and free of old sealant, grease, and debris before application. Allow adequate cure time before exposing the joint to water or mechanical stress. Follow applicable vessel safety and manufacturer guidelines for sealant use around through-hull fittings and structural deck hardware.

Technical Specifications

• Package Weight: 0.29 pounds
• Net Contents: 3 oz
• Color: White
• Container Type: Tube
• UPC: 00051135080177
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120479