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Black flexible tee-shaped pipe insulation, closed-cell elastomeric foam, unslit installation

K-Flex Usa

K-Flex Usa 801-T-068218 elastomeric tee pipe fitting insulation

SKU CH-98N7-5SA85

Elastomeric tee insulation for 2-1/8 in pipe, closed-cell Buna-N/PVC rated to 220 °F with antimicrobial and flame-retardant properties

  • Wide temperature range from -297 °F to 220 °F
  • Closed-cell foam resists moisture and microbial growth
  • Plenum-rated with flame spread index 25
  • Flexible unslit design simplifies tee fitting installation
  • R-value 5 delivers effective thermal insulation

Purpose-built pipe insulation

This K-Flex USA elastomeric tee fitting insulation covers 2-1/8 inch outside diameter tubing with a 3/4 inch wall. The closed-cell Buna-N rubber and PVC foam resists microbial growth and meets a 25 flame spread index for plenum-rated installations. It arrives unslit for custom fitting on site.

Sustained temperature performance

The material operates continuously from -297 degrees F up to 220 degrees F without degrading its R-value of 5. Closed-cell structure limits moisture ingress during long heating or cooling cycles, keeping thermal resistance stable across the full range. Flexibility remains consistent so the tee does not crack under repeated expansion.

Upgrade from basic wrap or slit sleeves

Builders replacing loose fiberglass wrap or pre-slit rubber sleeves gain a sealed, antimicrobial barrier that cannot sag or absorb condensate over time. The jump is worth it when plenum codes demand a 25 flame spread rating and the system sees deep-freeze or high-heat conditions that would break down lesser foams.

Highlights

  • Wide temperature range from -297 °F to 220 °F
  • Closed-cell foam resists moisture and microbial growth
  • Plenum-rated with flame spread index 25
  • Flexible unslit design simplifies tee fitting installation
  • R-value 5 delivers effective thermal insulation

Specifications

BrandK-FLEX USA

Questions about this item

Will the Buna-N rubber/PVC insulation stay flexible and resist heat buildup when the pipe runs continuously at high temperature?

The closed-cell elastomeric tee is rated for continuous operation up to 220 °F and remains flexible across its entire temperature range.

What pipe size and tools are needed to install this unslit tee fitting?

It fits a 2-1/8 in outside-diameter tube; the unslit design requires a sharp knife or insulation cutter to open and wrap the tee.

Can this plenum-rated tee be used alongside older pipe sections that only meet a lower flame-spread standard?

Yes, the tee carries a flame spread index of 25 and plenum rating, so it meets stricter fire codes than many legacy sections.

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