The following document describes the performance of T-FIT® Clean insulation regarding moisture and microbial resistance.

These properties are important in cleanroom, food and beverage, and pharmaceutical facilities. Moisture penetration can have debilitating effects; water conducts heat around twenty times better than air, so if moisture penetrates the insulation material it can cause an increase in the thermal conductivity of the insulation, reducing its effectiveness. Moisture penetration can also promote serious problems such as corrosion under insulation and bacterial growth, as well as increase the mass of the insulation, which can put the pipe system under additional strains.