3M 7100200231 Polyurethane Sealant 540 Black

Product Description

The 3M 7100200231 is a one-component, moisture-curing polyurethane sealant that forms permanently elastic bonds on a wide range of substrates. Sold as the 3M Polyurethane Sealant 540 in black, it cures upon exposure to ambient moisture without mixing or activation steps. The result is a flexible, durable seal suited for bonding and sealing applications in HVAC, construction, marine, and general industrial environments. Licensed tradespeople and maintenance professionals use it where long-term elasticity and adhesion to dissimilar materials are required. Its single-component format reduces prep time on the job.

This sealant is well suited for sealing joints and bonding components in both residential and commercial settings. Typical applications include sealing around panels, trim, and enclosures where the substrate mix includes plastics, fiberglass-reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal, and wood. HVAC technicians, sheet metal workers, and general contractors commonly use this product during installation and service work where a permanent, flexible seal is needed across mixed-material assemblies.

Key Features

• One-component formula requires no mixing — ready to apply directly from the cartridge
• Moisture-curing system activates at ambient conditions without heat or catalyst
• Forms permanently elastic bonds that resist cracking and movement over time
• Adheres to plastics, FRP, SMC, aluminum, steel, coated metal, and wood
• Black color suits applications where a discreet or color-matched seal is needed

Compatibility

Designed for bonding and sealing applications involving plastics, FRP, SMC, aluminum, steel, coated metal, and wood substrates.

Installation Notes

Application should be performed by qualified tradespeople familiar with sealant and adhesive work on the relevant substrate types. Surfaces must be clean, dry, and free of oils or loose material before application. Follow manufacturer surface-preparation guidance and applicable building or mechanical codes for the installation environment. Do not apply to surfaces that will be painted unless the sealant is confirmed compatible with the topcoat system.

Technical Specifications

• Cure Type: One-component moisture cure
• Color: Black
• Weight: 11.89 pounds
• UPC: 50021200490601
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100200231