Armaflex Self Seal Class O Insulation 28mm x 13mm

Wrapping 28mm copper or plastic, Armaflex Self Seal Class O Insulation puts a 13mm wall of closed cell foam round the pipe, closed with a self-adhesive seam. It is the step up from 22mm, used in larger houses, flats with shared plant and small commercial jobs.

Why 13mm Armaflex self seal insulation on 28mm pipe

A 13mm wall is a good all-round thickness for heating and hot water, and for stopping cold mains sweating in a warm room. Because the foam is closed cell, it holds up on chilled lines where open foam would take on water.

• Bore: 28mm
• Wall thickness: 13mm
• Overall size: about 54mm once fitted
• Length: 2m, pre-slit

Two 13mm walls plus the 28mm pipe gives roughly 54mm overall. So pick clips and sleeves for the lagged size, not the bare pipe. The full set of bores is in our pipe lagging and insulation category.

Close up the butt joints between lengths as carefully as the seam itself. A tin of Armaflex adhesive does the joints, and insulated supports help on chilled pipework.

28mm x 13mm pipe lagging from our Glasgow trade counter

Drop by Plumb Parts, 555 South Street, Glasgow G14 0QX. We open Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. Online ordering is available any time.

Specification

• Brand: Armaflex
• Range: Class O Self Seal
• Material: Closed cell elastomeric foam
• Connection: Pre-slit tube with self-adhesive seam
• Sizes: 28mm bore, 13mm wall, 2m long
• Standard or approval: Class O, as named
• Suitable for: Heating, hot and cold water pipework
• Pack quantity: One 2m tube

Common Questions

Where would I use 28mm x 13mm Armaflex?

On larger heating and hot water runs in bigger houses, shared plant and small commercial jobs, and on 28mm cold mains that sweat.

Should clips go round the bare pipe or the lagging?

Pick clips sized for the lagged pipe, or use insulated supports, so the foam is not squashed or broken at each fixing.

Is Armaflex suitable for chilled pipework?

Yes, the closed cell foam holds up on cold lines. Seal every joint so damp air cannot reach the pipe.