CEWAY-GP is a two-component, flexible cementitious waterproofing membrane. It is reinforced with specially selected and graded fine quartz. When blended, CEWAY-GP forms a flexible matrix of polymer and hydrate structures. This provides a breathable membrane which allows water vapour transmission but is impermeable to liquid water. CEWAY-GP is easily applied as a slurry onto horizontal and vertical surfaces. No priming is needed as CEWAY-GP has good substrate adhesion.