Armacell Armaflex Class O Self Seal 28mm o.d x 9mm x 2m

Armacell Armaflex Class-O Self Seal

Flexible closed-cell insulation material for use on hot & cold water services, chilled water, heating

The combination of a very low thermal conductivity and extremely high resistance to water vapour transmission prevents long-term energy losses and moisture ingress and reduces the risk of corrosion under insulation. The built-in Microban antimicrobial protection and the excellent fire performance make the product especially suitable for use in public buildings and process industries.

The key advantage of Armaflex products is their closed cell structure and high resistance to water vapour diffusion (mu factor ≥10,000) combined with a low thermal conductivity (0.033 W/(m.K). This means that energy losses can be minimised on heating and hot water services whereas on cold services condensation can be easily controlled, with water vapour pressure not able to penetrate the material.

The microcell structure is consistent throughout the entire insulation layer, meaning no external vapour barrier is required. Other materials used on cold applications such as mineral wool and phenolic insulation products are reliant on an external vapour barrier to prevent water vapour diffusion. If this vapour barrier is compromised, or the insulation system has gaps, condensation can spread through the insulation and lead to loss of thermal performance, corrosion problems and consequential damage to the surrounding buildings and equipment.