Gulf-O-Flex® Insulation

Gulf-O-Flex® NBRClosed-Cell NBR Rubber Pipe Insulation

The benchmark for elastomeric foam insulation — ASTM E84 certified, FM Approved, Class O fire rated HVAC duct and chilled water pipe insulation across the Middle East.

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Certified toISO 9001FM ApprovedUL ListedEPD VerifiedBS 476 Part 6 & 7ASTM E84 / UL 723
Overview

Built around three decades of regional know-how.

Gulf-O-Flex® NBR is a premium NBR rubber pipe insulation — a flexible elastomeric foam insulation made of Nitrile Butadiene Rubber (NBR), available in thicknesses from 6mm to 50mm in both sheet (with or without self-adhesive) and tube forms. This closed cell pipe insulation is a self-sustaining, passive solution to energy efficiency requiring no active maintenance to deliver consistent thermal and acoustic performance.

EN 14304 certified and fire rated rubber insulation with outstanding resistance to moisture vapor, mold, and mildew growth. Gulf-O-Flex® NBR ensures long service life, minimal downtime, and continuing efficiency across HVAC duct insulation, chilled water pipe insulation, refrigerant piping insulation, district cooling, hot & cold water plumbing, and industrial applications. CFC and HCFC free with zero ODP — FM Approved pipe insulation, UL Listed, and EPD Verified.

Manufactured
UAE, Saudi Arabia, Srilanka
Distributed
90+ countries
Lead time
2–4 weeks
Highlights

Why specifiers choose this grade.

  • 01Closed-cell structure, water absorption only 0.16 vol% (ASTM C534)
  • 02Zero water vapour transmission, 0.00 Perm in (ASTM E96/96M)
  • 03Self-extinguishing, Class O fire rated (BS 476 & ASTM E84)
  • 04FSI ≤ 25, SDI ≤ 50, verified per ASTM E84 / UL 723
  • 05Zero ODP, CFC and HCFC free, helps reduce greenhouse gas emissions
  • 06Anti-microbial: resists mold and mildew growth for long service life
  • 07High flexibility, covers pipes, bends, ducts, tanks, vessels and flat surfaces
  • 08Available with or without self-adhesive application
Gallery

Product close-up.

Technical Data

Full specifications.

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01Thermal Conductivity (λ)
0.0321 W/m·K at 35°C (ASTM C518-17)
02Operating Temperature
-40°C to +105°C (ASTM C 534)
03Density
50–70 kg/m³ (ASTM C 302-13)
04Fire Rating
Class O - FSI ≤ 25, SDI ≤ 50
05Water Absorption
0.16 vol% (ASTM C534 / C209-2015)
06Water Vapour Transmission
0.00 Perm in (ASTM E96/96M)
07Vapour Diffusion Factor (μ)
> 7,300 (ASTM E96/96M)
08NRC - 13mm / 19mm / 25mm
0.30 / 0.40 / 0.45 (ASTM C423-01)
09Cell Structure
Closed Cell
10Thickness Range
6mm to 50mm
11Available Forms
Tubes, Sheets
12Color
Black (standard)
Values are typical. Full tolerances available in datasheet.DOC · GOF-NBR-TDS-26
Use Cases

Specified across critical projects.

01
Hot & Cold Water Plumbing
02
Refrigeration Lines
03
HVAC Ducts & Duct Liner
04
District Cooling Networks
05
Industrial Process Piping
06
Plumbing Condensation Control
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Ready to specify Gulf-O-Flex® NBR?

Our technical team supports sizing, BoQs, submittals and compliance documentation for projects across the GCC and beyond.

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ISO 9001 Class O 90+ Countries
Technical desk
Mon – Sat · 09:00–18:00 GST
  • Project-specific sizing & BoQ
  • Submittals & compliance dossiers
  • Site visits & installer training
  • Sample dispatch within 48 hours
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