Bottrop, 14 June 2016. With Expert Proof one, MC-Bauchemie has developed a single-component bitumen- and solvent-free structural sealant that can be applied on site straight from the drum without any mixing or priming. Aside from the ensuing savings in both time and money, this new reactive waterproofing compound also impresses with its outstanding technical properties. It is highly flexible, crack-bridging and resistant to UV, ageing and frost conditions. Expert Proof one becomes rain-resistant in around six hours, and is completely cured to full mechanical strength within 24 hours.