Armaflex Self Seal Class O Insulation 15mm x 13mm

For 15mm pipe in cold spots, Armaflex Self Seal Class O Insulation with a 13mm wall is the thicker of the two walls listed here. Each 2m tube is slit along its length, with adhesive strips already on both cut faces, so it opens round the pipe and seals itself shut.

Where 13mm Armaflex self seal insulation earns its place

Go for 13mm where frost or condensation is the worry: a cold loft, an unheated garage, or a cold main that sweats in a warm kitchen. The closed cell foam keeps moisture out, so it works on cold pipes as well as hot ones. Because the seam sticks itself, it suits pipework that is already clipped to the wall, where you cannot slide a tube on from the end.

• Bore: 15mm, for 15mm copper or plastic pipe
• Wall: 13mm
• Length: 2m, collected from the counter
• Seam: pre-slit with self-adhesive strips

The thinner 9mm version and other bores are in our pipe insulation range.

Keep the seam faces clean and dry, because dust stops the tape holding. Do not stretch the tube round tight bends, as that thins the wall and opens the joint. Mitre the ends instead and seal them with Armaflex adhesive or tape. Butt it tight to clips and valves so there are no bare patches.

Buying 15mm x 13mm pipe lagging at the shop in Glasgow

Self seal tube for 15mm pipe is sold at Plumb Parts, 555 South Street, Glasgow G14 0QX. Trading Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. Orders also go through online.

Specification

• Brand: Armaflex
• Range: Class O Self Seal
• Material: Closed cell elastomeric foam
• Connection: Pre-slit tube with self-adhesive seam
• Sizes: 15mm 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

What does Class O mean on Armaflex?

Class O is a fire performance class used in UK building rules, covering how flame spreads across a surface. It is often written into commercial specs for insulation.

Is 13mm or 9mm better on 15mm pipe?

Use 13mm where frost or condensation is the worry, such as a cold loft or a sweating cold main. The 9mm suits pipes inside heated rooms.

Will Armaflex 15mm fit 15mm plastic pipe?

Yes. Plastic plumbing pipe sold as 15mm matches copper on the outside, so this Armaflex bore closes round either.