Armaflex EVO Pipe Insulation Coil Class O for AC & Refrigeration — 9mm & 13mm Wall

Armaflex EVO pipe insulation coil is the preferred choice for bulk AC and refrigeration installations — supplied in long coil lengths for efficient cutting to size, minimal waste and lower cost per metre than pre-cut tube.

• ✔ Class O fire-rated closed-cell elastomeric foam
• ✔ Supplied in coil form — cut to any length on site
• ✔ UV resistant — suitable for outdoor and exposed installations

Coil vs Tube — Which Do I Need?

• Coil (this product) — for longer pipe runs, bulk installs, multi-unit systems or where custom lengths are needed. Lower cost per metre. Cut to size on site.
• Self-seal tube (K-FLEX ST) — for standard domestic installs where speed of fitting is the priority. Pre-cut 2m lengths with self-adhesive seam.

For most multi-unit or commercial installations, coil is the more economical choice. For single-unit domestic installs where speed matters, see our K-FLEX ST Self-Seal pipe insulation.

When to Use Coil Insulation

• Long pipe runs between indoor and outdoor units
• Multi-unit or VRF/VRV system installations
• Commercial HVAC projects requiring bulk quantities
• Installations where custom cut lengths reduce waste
• Refrigeration pipework requiring continuous insulation runs

Cost Per Metre

Coil insulation offers a lower cost per metre than pre-cut tube on longer runs. Each coil provides between 20m and 70m depending on bore size and wall thickness — enough for multiple systems from a single purchase. Select your bore and wall thickness above to see the coil length and price for your specific size.

Choosing the Right Size

• Bore size must match your copper pipe OD — select from the dropdown above
• 9mm wall — standard for most domestic AC applications
• 13mm wall — for refrigeration, low temperature systems or where higher insulation performance is specified

Key Features

• Closed-cell elastomeric foam (NBR/PVC) — no additional vapour barrier required
• Class O fire rating — meets UK Building Regulations
• UV resistant — suitable for outdoor and exposed pipe runs
• Compatible with R410A, R32, R22 and most refrigerants
• Flexible — easy to fit around bends and fittings
• Supplied in coil form — minimal waste, efficient handling on site

Available Variants

Technical Specifications

Complete Your Installation

• Insulation Tape — seal all joints, cut ends and fittings
• K-420 Contact Adhesive — bond insulation on bends, tees and complex fittings
• AC Copper Pipe — refrigerant-grade pipework for AC systems
• Pipe Supports & Fixings — clips and brackets for securing insulated pipework
• Trunking & Cable Management — for neat routing of pipework

Used With

Armaflex EVO coil is installed over AC copper pipe after pressure testing. Seal all longitudinal seams with insulation tape and bond bends and fittings with K-420 adhesive. For underground or external pipe runs, see our Armaflex EVO Tuffcoat underground insulation.

Also known as: armaflex coil, pipe insulation roll, AC insulation coil, elastomeric foam coil, pipe lagging coil.

Order Armaflex EVO pipe insulation coil today — available from UK stock with fast trade delivery.