Thermal insulating closed cell products (such as K-Flex EC) have many advantages over the tradional open cell products made of wool or fiberglass.The air inside the closed cells has lower mobility than that produced in open cells, therefore the convective component of heat exchange is considerably lower.Vapour diffusion into the insulation is much lower, thus the thermal conductivity will be guaranteed longer, even without using protective coatings. They promote a natural inhibition of bacterial growth, because bacteria cannot spread within the structure.
Our materials are resistant to water vapour diffusion. The higer the resistance to the penetration of water vapour (denoted by Mu (µ)) the greater the consistency of performance over a period of time. This benefit is significant when insulating cold items where insulation thicknesses are chosen so as to achieve a surface temperature above the ambient dewpoint. Ambient humidity will try to breach the insulation in order to achieve equilibrium conditions.
Because the thermal conductivity of water is 0,58 W / (mK), and therefore about 16 times higher than our insulation , any absorption of water vapour could reduce the insulation efficiency. The formation of condensation on the surface of the tubing and ducting is the main cause of corrosion beneath insulation which quickly leads to damage of pipes and ducts.