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Black flexible foam tube insulation, six feet long, one inch wall thickness

K-Flex Usa

K-Flex Usa 6RX100278 Pipe Insulation 6 ft 1 in Wall Thickness

SKU CH-GPMV-R34CT

Flexible elastomeric tube insulation for 2 1/2 in pipe, 1 in wall thickness, R-5.9, plenum rated with flame spread 57 and smoke developed 82

  • Product colorBlack
  • Withstands extreme cold to -297 °F
  • Handles high heat up to 220 °F
  • Flame spread index 57 for fire safety
  • Smoke developed index 82 limits fumes
  • R-value 5.9 delivers strong thermal resistance

Product identity and intended use

K-Flex USA 6RX100278 is a six-foot length of flexible, closed-cell elastomeric tube insulation sized for two-and-a-half-inch pipe. It suits mechanical contractors and facility teams needing plenum-rated thermal protection on hot or cold lines.

Practical limits of the material and ratings

The foam carries a flame spread index of 57 and a smoke developed index of 82, so it meets typical plenum requirements. Continuous service range spans minus 297 degrees F to 220 degrees F, and the unfaced jacket leaves the surface exposed to mechanical damage or UV if not covered.

Capacity and headroom

One-inch wall thickness yields an R-value of 5.9, providing solid condensation control on chilled water and reasonable heat retention on heating mains up to the rated maximum. The unslit tube must be cut and sealed on site, which adds labour time and leaves joints as the primary thermal weak points.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 58% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameK-FLEX USA
Product colorBlack

Questions about this item

Should I choose the 1 in wall thickness or a different size for my 2 1/2 in pipe?

The 1 in wall thickness is designed for a 2 1/2 in pipe size and provides an R-value of 5.9, so select this version when insulating that specific pipe diameter.

What does the R-value of 5.9 mean once the insulation is installed on the pipe?

An R-value of 5.9 indicates the thermal resistance of the 1 in thick elastomeric foam, helping maintain fluid temperature and control condensation on the 2 7/8 in tube.

Is the 57 flame spread index and 82 smoke developed index compliant with plenum requirements?

Yes, the insulation carries a plenum rating with a flame spread index of 57 and smoke developed index of 82, meeting the standard for plenum installations.

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