SOPRASEAL LM 203 is a one-component spray applied non-permeable air barrier membrane used in wall construction. SOPRASEAL LM 203 is a water-based, ultra low VOC liquid product composed of a modified rubber formulation for elongation. This non-flammable, non-permeable air barrier provides moisture protection behind wall claddings such as brick, siding, metal panels, EIFS and stucco. Utilization of a slipsheet is required for stucco cladding.

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