5/8" ID x 1/2" Copper Tube Size x 72" x 3/8" Wall Rubber Insulation Cover

K-Flex 6RX038058 – 5/8" ID x 3/8" Wall Elastomeric Pipe Insulation, 6' Length

The K-Flex 6RX038058 is a flexible, closed-cell elastomeric thermal insulation designed for piping systems requiring moisture resistance and energy efficiency. With an inner diameter of 5/8 inch, a wall thickness of 3/8 inch, and a 6-foot length, this product is well-suited for insulating copper, steel, or PVC piping in commercial and residential mechanical applications.

This insulation is manufactured in the USA and delivers reliable performance across a broad temperature range. It is particularly effective in chilled water, refrigeration, and dual-temperature systems where condensation control and thermal stability are required. The closed-cell structure also resists mold and microbial growth, making it suitable for indoor environments where maintaining air quality is a concern.

Key Product Features

• Closed-Cell Foam Construction – Minimizes thermal loss and prevents moisture infiltration.
• R-Value: 2.6 – Provides consistent insulation performance per inch of thickness.
• Temperature Range: Operates effectively between -297°F and 220°F.
• Low VOC, Fiber-Free – Supports indoor air quality standards and eliminates airborne particulates.
• Integrated Antimicrobial Protection – Helps deter mold, mildew, and bacterial growth on the insulation surface.

Technical Specifications

• Inner Diameter: 5/8 inch
• Wall Thickness: 3/8 inch
• Length: 6 feet
• Thermal Resistance (R-Value): 2.6
• Service Temperature: -297°F to 220°F
• Material: Flexible elastomeric foam
• Manufacturing Origin: Domestic (USA)

Installation Notes

For best results, apply to clean, dry piping. Seams should be sealed with a compatible contact adhesive or pressure-sensitive tape to maintain vapor barrier integrity. The insulation is easily cut to length using a utility knife and may be secured using mechanical fasteners where required by code or specification. Installation should comply with project-specific mechanical insulation guidelines and applicable energy standards.

Professional Application Guidance

This product is engineered for use in HVAC and refrigeration systems where control of surface condensation and thermal transfer is essential. Its flexibility allows for use around bends and fittings, and its code-compliant flame and smoke performance (ASTM E 84 25/50) supports use in commercial building interiors.