Acoustic Duct Lagging — MLV Noise Barrier for HVAC Ducts and Pipes Steel Guard Safety's acoustic duct lagging is a flexible mass loaded vinyl (MLV) noise barrier engineered to wrap around noisy HVAC ducts and pipes to block sound transmission through the duct walls. The SCC-DW1 duct lagging uses a 1 lb per square foot MLV barrier with a reinforced foil facing on one side — delivering STC 27 performance in a thin, easy-to-install roll format. For applications requiring both sound blocking and thermal insulation, see our Acoustic Duct & Pipe Wrap with added quilted fiberglass decoupler layer. Duct Lagging vs Duct Wrap — What is the Difference Acoustic duct lagging is a simpler, thinner solution focused purely on MLV sound blocking for ducts and pipes. It wraps directly around the duct surface and secures with matching lag tape — ideal when the primary goal is noise blocking without added insulation thickness. Our Acoustic Duct & Pipe Wrap adds a quilted fiberglass decoupler layer for higher STC performance and thermal insulation value when both are needed. Duct Lagging Specifications Material: 1 lb sq/ft mass loaded vinyl with reinforced foil facing Thickness: 1/8 in Roll sizes: 48 in x 30 ft and 48 in x 50 ft STC 27 sound transmission loss Service temperature: -20°F to 220°F Fire rating: ASTM E-84 Class 1 Reinforced foil exterior accepts matching lag tape for easy sealing Applications HVAC ductwork noise control Pipe lagging for acoustic noise reduction Mechanical room duct and pipe wrapping Commercial and industrial HVAC noise compliance Anywhere duct or pipe noise transmission needs to be reduced For our full range of acoustic barrier products including mass loaded vinyl rolls and acoustic screens, visit our Sound Acoustic Barriers collection. Ships in 5-8 Business Days.
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