3M 7000121531 Hybrid Adhesive Sealant 4000 Uv White 3 Oz

Product Description

The 3M 7000121531 is a one-part hybrid adhesive sealant in the Fast Cure 4000 UV series, supplied in a 3 oz tube. It cures to form a firm, flexible, waterproof seal that resists UV degradation over time. The cured material absorbs and dissipates stress caused by shock, vibration, thermal expansion, and contraction, making it well suited for demanding marine environments. It is white in color and intended for use by professional marine technicians and tradespeople working on boat assembly, repair, or sealing applications above and below the waterline.

This adhesive sealant is formulated for marine applications where long-term UV exposure and water contact are constant concerns. Its one-part chemistry means no mixing is required, allowing for faster application in the field. Typical use cases include sealing deck hardware, hull fittings, and exterior joints on recreational and commercial vessels. The fast-cure formulation reduces downtime between application and return-to-service, which is a practical advantage in boatyard and on-water repair scenarios.

Key Features

• One-part formula requires no mixing prior to application
• Cures to a firm, rubbery, waterproof seal suitable for above and below waterline use
• Superior UV resistance makes it effective as a long-term cosmetic and structural sealant in sun-exposed areas
• Flexible cure absorbs stress from shock, vibration, swelling, and shrinking
• Fast-cure 4000 UV series reduces wait time before the joint returns to service
• White color finish for clean cosmetic results on light-colored surfaces

Compatibility

Designed for marine applications above and below the waterline, including deck hardware, hull fittings, and exterior joints on recreational and commercial marine vessels.

Installation Notes

Application is typically performed by marine technicians or experienced tradespeople familiar with adhesive sealant use. Surfaces should be clean, dry, and free of oil, grease, and loose material before applying the sealant. Follow all manufacturer safety guidelines regarding ventilation and skin contact during application. Allow full cure before exposing the joint to water or mechanical load.

Technical Specifications

• Package Weight: 0.4 pounds
• Container Size: 3 oz tube
• Color: White
• Cure Type: One-part, fast cure
• UV Resistance: Superior
• Unit of Measure: Each
• UPC: 00051135052808

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121531