Impermax is a single component, high performance waterproofing material, based on Polyurethane, certified according to EEC Directive 98/83/CE, and which can be in direct contact with drinking water for human consumption. It can easily be applied on different kinds of surfaces used in hydraulic infrastructures such as concrete, mortar, ceramics, fibreglass, reinforced polyester, etc. Curing time: 4-6 hours (in the summer), 12-24 hours (in the winter). Not suited for PP or PE. Apply at least 3-4 layers to obtain a membrane thickness of 1.5 to 1.9mm (2 kilo per m^2). It is recommended to use humidity primer in most situations.