SOPRASEAL LM 204 VP is a one-component, 90% solids content, low-odor, vapor-permeable, liquid-applied polyether air barrier product. This new, hybrid STPE technology provides excellent air infiltration and moisture protection while also offering ease of use in low-and high-temperature applications, superior elastomeric performance and tie-in compatability. A fully adhered, monolithic membrane option, it provides a continuous air barrier.