Armaflex EVO Self Seal Pipe Insulation Lagging Black Nitrile Foam Class O 2m

Armaflex EVO Self Seal Pipe Insulation — Black Nitrile Foam, Class O, 2m

Armaflex EVO is the world's leading elastomeric foam pipe insulation, manufactured by Armacell and trusted by M&E contractors, HVAC engineers and refrigeration specialists for over 40 years. The Self Seal version features a factory-applied self-adhesive closure strip — simply cut to length, open the slit, place around the pipe and press to seal. No adhesive, no tools, no mess.

Armaflex EVO delivers the complete package: Class O fire rating, superior condensation control, built-in Microban® antimicrobial protection and a thermal conductivity of λ ≤ 0.033 W/mK — all in a flexible, lightweight tube that installs in seconds.

Key Benefits

• Self-adhesive closure — factory-applied seal strip for fast, tool-free installation. No Armaflex adhesive required for straight runs
• Class O fire rated — meets BS 476 Part 6 and Part 7 requirements for surface spread of flame. Suitable for commercial and public buildings
• B-s2,d0 fire classification — produces 50% less smoke than standard elastomeric foams, improving visibility and evacuation time in the event of fire
• Superior condensation control — closed-cell structure with water vapour resistance μ ≥ 10,000, preventing moisture ingress and pipe corrosion
• Microban® antimicrobial protection — built-in technology inhibits mould and mildew growth throughout the product's lifetime
• Low thermal conductivity — λ ≤ 0.033 W/mK, minimising heat gain on chilled pipework and heat loss on heating systems
• Proven longevity — Armaflex installations from the 1980s have been tested and shown to retain full technical performance after 40+ years

Technical Specifications

• Material: Closed-cell nitrile rubber (NBR) elastomeric foam
• Colour: Black
• Length: 2m per tube
• Closure: Self-adhesive lap (self seal)
• Thermal conductivity: λ ≤ 0.033 W/mK at 0°C
• Water vapour resistance: μ ≥ 10,000
• Fire classification: Class O (BS 476), B-s2,d0 (EN 13501)
• Operating temperature: -50°C to +105°C
• Antimicrobial: Microban® built-in protection

Wall Thickness Selection Guide

• 9mm wall — Condensation control on chilled water and cold pipework in conditioned spaces
• 13mm wall — Standard specification for heating, hot water and chilled water pipework. Meets Part L for most domestic applications
• 19mm wall — Enhanced thermal performance for commercial HVAC, chilled water and frost protection
• 25mm wall — Maximum performance for chilled water, refrigeration and exposed pipework

Shop by Pipe Size

15mm | 22mm | 28mm | 35mm | 42mm | 48mm | 54mm | 60mm | 76mm | 89mm | 114mm

Applications

• Chilled water flow and return pipework in commercial HVAC systems
• Heating and hot water pipework in commercial and domestic buildings
• Refrigeration and process pipework
• Air conditioning systems and fan coil unit connections
• Data centre cooling pipework
• Solar thermal and heat pump pipework

Complete Your Installation

• Armaflex 520 Adhesive — Required for butt joints, bends and fittings where the self-seal closure cannot be used
• Armaflex Lagging Tape — Black foam tape for finishing exposed edges and joints to a professional standard
• Armaflex Tuffcoat Tape — UV-resistant protective tape for outdoor and exposed Armaflex installations
• Rubber & Standard Pipe Clamps — Secure your insulated pipework with the correct pipe clamps

For technical advice on specification, compliance with Part L or CIBSE Guide C, or help selecting the right wall thickness, call our team on 0161 775 1190 (Mon–Fri 8am–4pm).

Technical Downloads

• 📄 Armaflex EVO — Technical Data Sheet (PDF)
• 📄 Armaflex EVO — Product Brochure (PDF)
• 📄 Armaflex EVO — Environmental Product Declaration (PDF)
• 📄 Armaflex EVO — Declaration of Performance (PDF)
• 📄 Armaflex EVO — Safety Data Sheet (PDF)