Armaflex Self Seal Class O Insulation 35mm x 13mm

Our Armaflex Self Seal Class O Insulation in 35mm x 13mm goes over 35mm copper pipe and closes with its own adhesive strips. At 13mm thick, the wall suits hot runs and cold ones that would otherwise drip.

Where 35mm Armaflex self seal insulation is used

This size is mostly found on commercial heating and hot water mains, school and office plant and bigger rising mains. The foam is closed cell, so it acts as its own vapour barrier on cold lines. The Class O tag in the name refers to its fire performance, which is often asked for on commercial jobs.

• Bore: 35mm, for 35mm copper
• Wall thickness: 13mm
• Overall size: about 61mm once on
• Length: 2m, pre-slit with adhesive strips

Allow around 61mm for clip spacing and for holes through walls. Thinner tube and other bores are listed in our pipe insulation category.

The adhesive likes a warm, dry pipe. Fit it when the pipe is not sweating, and put the seam where you can get a hand on it to press it home. Seal butt joints with Armaflex adhesive or tape.

Picking up 35mm x 13mm pipe lagging in Glasgow

The 13mm wall tube for 35mm pipe is sold at Plumb Parts, 555 South Street, Glasgow G14 0QX. It opens Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. If it suits better, order online.

Specification

• Brand: Armaflex
• Range: Class O Self Seal
• Material: Closed cell elastomeric foam
• Connection: Pre-slit tube with self-adhesive seam
• Sizes: 35mm 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

Is Armaflex 35mm x 13mm for commercial jobs?

Mostly, yes. 35mm copper is found on commercial heating and hot water mains, plant rooms and larger rising mains.

Can I fit self seal tube to a sweating pipe?

Fit it while the pipe is dry, because the adhesive will not grip a wet surface. Turn off chilled flow or wait for a dry spell if you can.

Why is Class O asked for on commercial work?

Specs often set fire performance limits for exposed insulation, and Class O is one of the classes they name.