3M 7000123397 Urethane Foam Tape 4314 Charcoal Gray 3/8in X 18yd

Product Description

The 3M 7000123397 is a single-coated, open-cell urethane foam tape sold under the 3M Urethane Foam Tape 4314 product line in charcoal gray. The tape measures 3/8 inches wide by 18 yards long with a 250 mil (0.250 inches) total thickness. Its soft, conformable foam construction allows it to compress against irregular surfaces, creating a reliable barrier against moisture infiltration, dust, and drafts. HVAC technicians, glazing contractors, and construction trades use this tape where a compressible, low-profile seal is needed in both interior and exterior applications.

This tape is suited for sealing gaps in HVAC enclosures, window and door framing, panel joints, and equipment cabinets where a flexible, conformable seal is required. The open-cell urethane foam compresses readily under light clamping force, making it practical for sealing around irregular or slightly out-of-square surfaces. It is commonly applied in residential and light commercial construction and mechanical service work where dust and moisture exclusion is a priority.

Key Features

• Single-coated open-cell urethane foam construction conforms to irregular surfaces
• 250 mil (0.250 inches) thickness provides meaningful compression depth for gap sealing
• 3/8 inches wide by 18 yards per roll for efficient coverage on standard joint widths
• Charcoal gray color suits concealed or low-visibility installation areas
• Seals against moisture, dust, and drafts without requiring supplemental sealant

Compatibility

Designed as a general-purpose urethane foam sealing tape suitable for HVAC panels, window and door assemblies, and equipment enclosures where a compressible single-coated foam seal is specified.

Installation Notes

Surface should be clean, dry, and free of oils or loose debris before tape application to ensure proper adhesion. Apply firm hand pressure along the full length of the tape to activate the adhesive bond. Avoid stretching the tape during application, as this can reduce effective thickness and sealing performance. No special tools are required, but a roller or seam press is recommended for consistent contact on longer runs.

Technical Specifications

• Tape Thickness: 250 mil (0.250 inches)
• Width: 3/8 inches
• Length: 18 yards per roll
• Foam Type: Open-cell urethane foam
• Coating: Single-coated
• Color: Charcoal gray
• Unit of Measure: Roll
• Weight: 0.24 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000123397