3M Company 3920-BK Multi-purpose Duct Tape 1.88in X 20yd Black

Product Description

The 3M COMPANY 3920-BK is a black, multi-purpose duct tape supplied in a 1.88-inch-wide by 20-yard roll. It is built for professionals and tradespeople who need a reliable, general-purpose tape for temporary repairs, bundling, sealing, and organization tasks. The backing tears cleanly by hand without tools, and the adhesive applies smoothly to flat and curved surfaces alike. The waterproof backing resists moisture, making it suitable for both indoor and outdoor applications. Each case contains 12 rolls.

This tape is commonly used across HVAC, plumbing, electrical, and general maintenance trades for discrete repairs, surface protection, labeling, and color-coded organization. The black finish makes it well-suited for repairs where a low-visibility, clean appearance is preferred. It is appropriate for residential and light commercial environments wherever a durable, flexible tape solution is needed.

Key Features

• Waterproof backing resists moisture for indoor and outdoor use
• Tears cleanly by hand — no cutting tools required
• Conforms and adheres to curved and irregular surfaces
• Black color supports discreet repairs and color-coding systems
• Supplied 12 rolls per case for job-site or shop stocking

Compatibility

Designed as a general-purpose duct tape suitable for use across HVAC, plumbing, electrical, pool, and facility maintenance applications wherever a flexible, waterproof cloth-backed tape is required.

Installation Notes

Surface preparation is critical for adhesion — clean, dry, and dust-free surfaces will yield the best bond. Apply with firm pressure along the full length of the tape. For HVAC duct sealing applications, verify local code requirements, as pressure-sensitive cloth duct tapes may not satisfy UL 181 listing requirements for certain duct systems. Remove the tape from surfaces before applying heat or paint to avoid residue transfer.