PREPRUFE® Plus / PREPRUFE® 800PA Waterproofing System

Integrally bonded HDPE sheet waterproofing with dual adhesive laps for pre-applied waterproofing applications for installation below slab. Basis of design is PREPRUFE® 300R Plus by GCP Applied Technologies. 

Membrane shall be 1.2mm thick, uniform, flexible sheets consisting of 0.8mm thick, HDPE sheet coated with a pressure-sensitive adhesive, a trafficable weather resistant coating.  
The membrane shall have a kick-out roll function to facilitate ease of application and shall have no release liner to reduce the environmental impact. Continuity between adjacent sheets shall be assured with dual adhesive laps. The membrane shall form an integral and permanent bond to placed concrete to prevent water migration at the interface of the membrane and structural concrete.  
The membrane shall be chemically resistant and protect the structure from salt and sulphate attack. It shall have been proven to be tested to a resist a minimum lateral water migration of 70m head of water (686kpa), at the membrane concrete interface and have a zero permeance to moisture, it will not activate prematurely due to wet conditions and is unaffected by ground settlement beneath slabs.