MasterRoc MSL 345

MasterRoc® MSL 345 is an EVA polymer based sprayable membrane for the waterproofing of underground concrete structures.
It is spray applied in a sandwich structure between two sprayed concrete / cast concrete layers, creating a double bonded composite shell lining.
It is flexible and has very high bond strength properties on both sides of the membrane.
It is an effective alternative to conventional waterproofing sheet membranes.
As a double bonded system, this provides excellent water tightness, preventing the development of water migration on both sides of the membrane.
As with all spray applied membranes, it is not possible to seal against water ingress through the substrate. In such cases, a drainage system or local water management using drainage pipes should be used in combination with MasterRoc® MSL 345.
However, it can be applied to damp substrate (if there is no running water).

Particularly well suited for underground structures with complex profiles and geometry such as stations, escape and access tunnels, utility caverns, cross passages and tunnel intersections.
Suitable for all types of tunnel designs.
Enables tunnel design with composite shell lining to reduce excavation cross section and lining thickness, and is especially suited to tunnel rehabilitations.

Fast curing
Easy to use, only addition of water needed
Application by spraying with simple equipment
Elasticity 80% to 140% depending on temperature
No toxic components
No classification needed for transport
Available in 2 colors if specification is requiring a 2-coat application otherwise applied as a 1 coat system

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