WATERBLOK Multi-Purpose RWPC is a waterbased liquid applied rubberized bitumen and comprises of the highest grade of refined bitumen, rubber latex and mineral fillers. WATERBLOK is a revolutionary and extremely versatile waterproofing product capable of waterproofing surfaces ranging from earth dams for water impounding (on the bare compacted earth just using a geotextile reinforcement) to any concrete or masonry surface,galvanized metal sheeting and even wooden surfaces. It is non-toxic and suitable for the storage of potable water.
If it can hold water in an earth dam as above, how much more will it not keep water from penetrating a roof deck, balcony, ledge, gutter, toilet, bathroom, etc.