Armaflex Pipe Insulation Lagging Tape 50mm x 3mm x 15m Black Foam Class O

Armaflex Pipe Insulation Lagging Tape – 50mm x 3mm x 15m, Black Foam Class O

Armaflex Lagging Tape is a self-adhesive black nitrile rubber foam tape designed to seal joints, butt ends, and irregular sections on Armacell Class O pipe insulation. It provides a continuous, professional finish on insulated pipework, preventing heat loss, condensation, and air infiltration at vulnerable connection points.

One of the UK's best-selling pipe insulation accessories — used by HVAC engineers, refrigeration engineers, plumbers and DIY installers across the country.

Key Benefits

• Class O fire rated – meets the same fire classification as Armaflex AF and Armaflex Class O pipe insulation (BS 476 Parts 6 & 7)
• Same material as Armaflex insulation – consistent thermal conductivity and vapour resistance at every joint
• Self-adhesive backing – peels and sticks directly to insulation surfaces; no additional adhesive required for most applications
• Closed-cell nitrile foam – low thermal conductivity and high vapour resistance prevent condensation at joints
• Flexible and conformable – wraps cleanly around bends, tees, valves, and irregular fittings
• Noise reduction – foam construction dampens pipe noise and vibration
• Versatile – also suitable as draught sealing tape for doors, windows, loft hatches and service penetrations

Technical Specifications

• Material: Closed-cell nitrile rubber foam (NBR/PVC)
• Width: 50mm
• Thickness: 3mm
• Roll length: 15m
• Colour: Black
• Fire classification: Class O (BS 476 Parts 6 & 7)
• Backing: Self-adhesive (peel and stick)

Applications

• Sealing joints, butt ends and end caps on Armaflex pipe insulation
• Repairing cuts or damaged sections of Armaflex insulation on site
• Finishing exposed edges on Armaflex sheet insulation
• Sealing joints in tight or awkward spaces where adhesive is impractical
• HVAC, refrigeration and chilled water pipework where a vapour-tight, fire-rated finish is required
• Draught sealing for doors, windows, loft hatches and service penetrations
• General pipe lagging tape for domestic and commercial plumbing

Tape vs Adhesive — Which Should You Use?

For primary longitudinal seams and butt joints on Armaflex pipe insulation, Armaflex 520 adhesive gives a stronger, more reliable bond. Use Armaflex tape for repairs, finishing edges and sealing joints in locations where applying adhesive is impractical. For a professional installation, use adhesive for primary joints and tape for finishing and repairs.

Frequently Bought Together

• Armaflex Pipe Insulation — the insulation this tape is designed to seal
• Armaflex 520 Adhesive — for bonding longitudinal seams and butt joints
• Armaflex Sheet Insulation — for flat surfaces, ductwork and van insulation panels

In stock and available for fast UK delivery from Pipelagging.com.