Masterseal 345 

Product description

MASTERSEAL^® 345 is a sprayable membrane for the waterproofing of concrete structures. MASTERSEAL^® 345 is spray applied in a sandwich construction between layers of sprayed or cast concrete. It has good bond strength characteristics to the substrates on both sides of the membrane and behaves elastically.

As a fully bonded system, this promotes excellent watertightness characteristics to the underground structure, preventing the development of water migration on both concrete-membrane interfaces.

MASTERSEAL^® 345 undergoes a chemical hardening between 4 and 6 hours (depending on environmental conditions) sufficient to allow a further structural sprayed concrete lining to be placed, thereby preventing disruption to standard construction sequences.

As with all spray applied products, it is not possible to seal against active water ingress through the substrate. In such cases the MASTERSEAL^® DR1 drainage system is recommended to be used in combination with MASTERSEAL^® 345, or local management using drainage pipes. Please refer to the MASTERSEAL^® DR1 Technical Data Sheet for details. However, MASTERSEAL^® 345 can be applied to damp and wet (no running water) substrate.

Steel fibre reinforced sprayed concrete can be used on both sides of the MASTERSEAL^® 345 membrane.