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Green rectangular insulation sheet with adhesive backing, 36 by 48 inches, three-quarter inch thick

Nomaco Kflex

Nomaco Kflex 6RSHF3X4068 trap

SKU CH-FCVD-QHRW9 MPN 6RSHF3X4068

Halogen-free NBR rubber sheet, 36 by 48 inches, ¾ in thick, plenum-rated with 25/50 flame-smoke indices

  • Product typeDrain Components
  • Main materialHAWA
  • Product colorGreen
  • Halogen-free NBR material reduces toxic emissions
  • Flame spread index 25 meets strict fire codes
  • Smoke developed index 50 limits visibility hazards
  • Operates from -297 °F to 250 °F for extreme conditions
  • Closed-cell foam with R-value 3 delivers efficient thermal resistance

Halogen-Free NBR Insulation Sheet

The Nomaco Kflex 6RSHF3X4068 is a flexible insulation sheet made from halogen-free NBR based elastomeric material. It comes in a green colour with an adhesive backing for direct application. The sheet measures 36 in by 48 in with a thickness of 3/4 in. It is designed for thermal insulation in plumbing and HVAC systems.

Temperature and Fire Performance Limits

This insulation sheet operates across a wide temperature range from -297 Degrees F up to 250 Degrees F. It carries a Flame Spread Index of 25 and a Smoke Developed Index of 50. The product is Plenum Rated with an unfaced jacket. These ratings define the practical limits for safe installation in air-handling spaces.

R Value 3 Thermal Resistance

The single specification that decides suitability is the R Value of 3, which quantifies the thermal resistance of the 3/4 in thick closed-cell foam. Buyers needing a higher R-value for greater thermal performance must select a thicker or different insulation product. This sheet meets the requirement only where R-3 is specified.

How it compares

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

Price $64.99
Pricier than about 69% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNomaco Kflex
Model name6RSHF3 × 4068
Product typeDrain Components
Product colorGreen
Size & build
Main materialHAWA

Questions about this item

Should I choose the 36 in by 48 in sheet or a different size for my duct run?

This item is supplied as a single 36 in by 48 in sheet; if your duct run needs a different dimension you would need to cut this sheet or source another size.

What does the R value 3 mean once the sheet is installed on a duct?

The R value 3 indicates the thermal resistance of the 3/4 in thick elastomeric foam, reducing heat loss or gain through the duct wall by that rated amount.

How does the plenum rating and flame spread index 25 affect where I can install this insulation?

The plenum rating and flame spread index 25 mean the material meets code requirements for use in air-handling plenums and other spaces where low flame spread is mandated.

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