Carbon-Core’s CondensBlock is a top quality moisture absorbent material used to address the accumulation of condensation inside of non-insulated structures. When applied correctly to the underside of a metal roof, the material will soak up and disperse condensation throughout the material until it can air out. This keeps the interior dry and moisture free, stopping drips of condensation. Additionally, CondensBlock is 100% mold and mildew resistant, helps prevent corrosion of the roof, and can be used in a variety of applications. SphereCel CondensBlock is a top quality intumescent material used to address the accumulation of condensation inside of non-insulated structures.