To protect the IBC contents from moisture, respiration dryers are used, which are screwed directly onto the cover. All the air drawn in is completely dried.
During the extraction of the isocyanate, polyol, silicone, PU metal catalyst or other substances, the air drawn in is dehumidified to an initial 2%rh (average 10%rh). Thus, the air drawn into the IBC contains only contains 1.7g of water per m³ of air (1x IBC unit). This almost completely eliminates the influence of humidity on the isocyanate.