Armaflex® HT

Armaflex® HT is a specially developed insulation material made from closed-cell EPDM rubber, designed for applications where high temperatures, UV exposure and moisture protection are all important factors. The material is characterised by high temperature resistance up to +150 °C in continuous operation and remains permanently flexible even in cold conditions down to –50 °C. This makes Armaflex® HT suitable for a wide range of technical applications – from solar and heating systems to industrial piping systems and complex installations in mechanical and plant engineering.

The closed-cell structure acts as an integrated vapour barrier. Unlike open-cell insulation materials, moisture absorption is permanently prevented, which significantly reduces the risk of corrosion under insulation (CUI). This property makes Armaflex® HT particularly reliable for outdoor applications or damp environments where condensation could pose a serious problem. At the same time, the material impresses with a very low thermal conductivity of ≤ 0.042 W/mK, effectively minimising energy losses.

Another key benefit is its high UV and weather resistance. While many insulation materials are suitable only for sheltered areas, Armaflex® HT remains operational even under direct sunlight and retains its mechanical and thermal properties over the long term. Combined with resistance to ozone, oil and chemicals, this makes it a durable, robust solution for external insulation and industrial applications subject to increased stresses.

Armaflex® HT also meets key fire safety standards: it is classified as ‘D-s3, d0’ (sheets) or ‘D(L)-s3, d0’ (rolls) according to EN 13501-1. This means that the material is flame-retardant, does not produce burning droplets in the event of a fire and emits only minimal smoke. It also meets the international UL 94 V-0 classification and the British fire safety class 1 according to BS 476 Part 7 – clear evidence of its safety in use.

Installing Armaflex® HT is straightforward. The rolls and sheets are easy to cut to size and can be flexibly wrapped around pipes, fittings or tanks. As the product is supplied without self-adhesive backing, it can be secured using adhesive systems or cladding depending on requirements, allowing for application-specific customisation.