Engineered strictly for the commercial refrigeration and air conditioning industry, Nu-Calgon 4217-W3 Cork Insulation Tape is the professional choice for managing thermal insulation on refrigerant lines and cold pipes. This 2" x 1/8" x 30' self-adhesive pipe wrap provides a superior barrier against sweating and condensation, ensuring system efficiency in high-humidity environments. With a thermal conductivity (K-factor) of 0.88 and an R-value of 1.14, it effectively isolates copper tubing and iron pipes from ambient temperatures ranging from -30°F up to 200°F. Its specialized formulation prevents sagging even at intermittent temperatures of 350°F, making it suitable for hot pipe insulation and discharge lines. Beyond thermal control, this cork tape remains flexible, facilitating a tight seal on complex valves, tees, and fittings, while also serving as a high-performance sound-deadening material and gasket material. It adheres instantly to dry metal surfaces, eliminating the need for additional adhesives or mechanical fasteners.

Key Benefits for HVACR Technicians

Stops Condensation: Prevents moisture buildup and "pipe sweating" on low-temperature suction lines.
Flexible Application: Easily wraps around irregular shapes including valves, elbows, and joints with a 50% overlap for maximum protection.
Extreme Temperature Rating: Maintains integrity in sub-zero environments as low as -30°F and remains stable on high-heat lines up to 350°F without sagging.
Sound Dampening: Reduces vibration noise when applied as a padding or gasketing material between components.
Superior Adhesion: Features high-tack adhesive and excellent paper release for fast, clean installation on the job site.

Common Questions

Can cork insulation tape be used on steam lines?
While cork tape is rated for hot applications and won't sag up to 350°F, it is primary designed for refrigerant lines and hot water pipes. For high-pressure steam, verify that the continuous operating temperature does not exceed 200°F to maintain the material's thermal properties.

How do I ensure the tape doesn't peel off in cold weather?
For maximum adhesion strength, always clean the pipe surface of moisture, oil, and dirt before application. This tape is specifically formulated to be applied at temperatures as low as -30°F, provided the surface is dry at the time of contact.

Does this tape require additional mastics or coatings?
No. The Nu-Calgon 4217-W3 is a standalone insulating material that seals tightly to itself. However, in extremely high-humidity or sub-ambient conditions, applying multiple layers or a 50% spiral overlap is recommended to keep the surface temperature above the dew point.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

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Nu-Calgon 4217-W3 Cork Insulation Tape