3M 7000000942 Polyurethane Sealant 540 Gray 10.5 Oz

Product Description

The 3M 7000000942 is a one-component, moisture-curing polyurethane sealant sold in a 10.5 fluid ounce cartridge. It cures to form a permanently elastic bond, making it suitable for joints and seams that experience movement, vibration, or thermal cycling. The gray color blends well with metal and composite substrates. It adheres to a wide variety of surfaces including plastics, fiberglass-reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal, and wood. Typical installers include sheet metal fabricators, body shop technicians, marine maintenance crews, and general contractors working on enclosures, panels, or structural assemblies.

This sealant is used in applications where a flexible, durable seal is required between dissimilar materials. Common scenarios include sealing around fastener penetrations, bonding trim and panel assemblies, and waterproofing lap joints on metal or composite structures. It is well-suited to both interior and exterior applications where long-term elasticity and adhesion to mixed substrates are needed.

Key Features

• One-component formula requires no mixing before application
• Moisture-curing system allows use in field conditions without special equipment
• Permanently elastic bond accommodates joint movement and vibration
• Adheres to plastics, FRP, SMC, aluminum, steel, coated metal, and wood
• Gray color suitable for metal panel and composite assembly applications
• Standard 10.5 fluid ounce cartridge fits common caulk guns

Compatibility

Designed for use on plastics, FRP, SMC, aluminum, steel, coated metal, and wood substrates as stated by the manufacturer. Verify surface preparation requirements for each substrate type before application.

Installation Notes

Apply using a standard 10.5 ounce cartridge caulk gun. Surfaces must be clean, dry, and free of oil, grease, and loose material before applying sealant. Follow all applicable local building codes and manufacturer surface-preparation guidelines. Allow adequate cure time before exposing the joint to water or mechanical stress.

Technical Specifications

• Net Fill: 10.5 fluid ounces
• Weight: 0.88 pounds
• Color: Gray
• Cure Type: Moisture-curing, one-component
• Bond Type: Permanently elastic
• Unit of Measure: Each
• UPC: 00021200415944

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000942