Armaflex Ultima Pipe Insulation

Armaflex Ultima Pipe Insulation — Low Smoke, Halogen-Free

Armaflex Ultima is Armacell's premium low smoke, halogen-free elastomeric foam pipe insulation, engineered for applications where fire safety and smoke toxicity are critical. Part of the Armaflex range, Ultima achieves a Euroclass B-s1,d0 fire classification — the highest smoke performance available in flexible elastomeric pipe insulation — making it the specified choice for underground rail, tunnels, data centres and sensitive public buildings.

Armaflex Ultima retains all the core performance characteristics of Armaflex EVO — closed-cell structure, built-in vapour barrier, low thermal conductivity and flexibility — while delivering significantly reduced smoke density and zero halogen content in the event of fire.

Key Benefits

Euroclass B-s1,d0 fire classification — the lowest smoke production and no burning droplets of any flexible elastomeric pipe insulation. Critical for evacuation safety in enclosed spaces
Halogen-free — produces no toxic halogen gases in the event of fire, protecting occupants and emergency responders
Low smoke density — maintains visibility in escape routes and reduces toxic gas exposure during evacuation
Built-in vapour barrier — closed-cell structure with μ ≥ 7,000, preventing condensation on chilled water and cold pipework
Low thermal conductivity — λ ≤ 0.036 W/mK, providing effective thermal insulation across heating and cooling applications
Flexible and lightweight — installs around fittings and bends without cutting, reducing installation time on complex pipework

Technical Specifications

Material: Closed-cell halogen-free elastomeric foam
Fire classification: Euroclass B-s1,d0 (EN 13501-1)
Thermal conductivity: λ ≤ 0.036 W/mK at 0°C
Water vapour resistance: μ ≥ 7,000
Operating temperature: -50°C to +105°C
Halogen content: Zero

Where Armaflex Ultima is Specified

Underground rail and metro systems — meets EN 45545 and project-specific fire safety requirements for rolling stock and station infrastructure
Road and rail tunnels — specified where low smoke and halogen-free performance is mandated by fire safety engineers
Data centres — protects sensitive equipment and personnel in the event of fire; halogen-free specification increasingly required by data centre operators
Hospitals and healthcare facilities — where smoke toxicity standards exceed standard building regulations
Airports and transport hubs — high-occupancy public buildings with enhanced fire safety specifications
Commercial HVAC and chilled water — where project specifications require low smoke performance beyond Class O

Armaflex Ultima vs Armaflex EVO

Use Armaflex Ultima when the project specification requires Euroclass B-s1,d0, low smoke density, halogen-free or EN 45545 compliance
Use Armaflex EVO for standard commercial and domestic HVAC, heating, chilled water and plumbing where Class O (B-s2,d0) is sufficient

Shop by Pipe Size

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

Complete Your Installation

Armaflex 520 Adhesive — For bonding Armaflex Ultima at butt joints, bends and fittings
UD Tape — Armaflex Ultima Low Smoke Adhesive Tape — Matching low smoke adhesive tape for Ultima installations
Rubber & Standard Pipe Clamps — Correct pipe clamps for insulated pipework

For specification support, fire safety compliance advice or project-specific requirements, call our team on 0161 775 1190 (Mon–Fri 8am–4pm).