1/2" ID x 3/8" Copper Tube Size x 72" x 3/8" Wall Rubber Insulation Cover

K-Flex 6RX038048 – 3/8" ID x 3/8" Wall Pipe Insulation, 6 Ft Length

The K-Flex 6RX038048 Insul-Tube® is a closed-cell elastomeric thermal insulation engineered for piping systems requiring protection from heat loss and condensation. This tube insulation, with a 3/8-inch nominal inside diameter and 3/8-inch wall thickness, is suitable for copper tubing and iron pipe applications in HVAC, refrigeration, and plumbing systems.

Product Features

• Closed-Cell Structure – Limits moisture absorption and eliminates the need for additional vapor barriers under most operating conditions.
• Flexible NBR/PVC Foam – Accommodates bends and irregular piping layouts without tearing or compression loss.
• Low Thermal Conductivity – Maintains insulation performance with minimal heat transfer over time.
• Condensation Control – Helps prevent water accumulation on cold lines, reducing risk of corrosion and mold.
• Manufactured in the USA – Produced to meet ASTM and UL requirements for mechanical insulation.

Technical Specifications

• Inside Diameter: 3/8"
• Wall Thickness: 3/8"
• Length: 72 inches (6 feet)
• Material: NBR/PVC-based closed-cell elastomeric foam
• Temperature Range: -297°F to +220°F
• Compliance: Meets UL 94, GREENGUARD Gold, ASTM C534

Installation Guidelines

K-Flex insulation is designed for ease of application and should be installed over clean, dry surfaces. Use appropriate adhesive for seam and joint closure to ensure vapor-tight performance. For applications exposed to mechanical abuse or UV, additional jacketing may be required. Always follow local mechanical code requirements during installation.

Typical Applications

Suitable for chilled water lines, hot water piping, refrigerant systems, and condensate lines in residential, commercial, and industrial systems. Helps maintain system efficiency and reduce long-term energy costs.