RectorSeal Smoke and Acoustic Sealant is high grade acrylic latex sealant formulated to provide a seal for penetrations, membrane openings, and static or dynamic joints in smoke or sound rated assemblies. RectorSeal Smoke and Acoustic Sealant provides an excellent sound attenuation characterisitics in accordance with ASTM E90 and reduces the movement of smoke and airborne particles as demonstrated in air leakage testing modified UL 1479 and modified UL 2079.