Johns Manville new and improved Permacote® Linacoustic® RC-HP is a flexible duct liner insulation that provides enhanced acoustical performance versus standard duct liners. It has been recently redesigned to include a glass mat on the airstream surface that is coated with our proprietary Permacote® coating. This provides a durable surface that is resistant to dust and dirt and provides added product protection against microbial growth. Our unique flame-attenuated technology yields a very controlled fine fiber characteristic that results in a fiber glass core unmatched by our competitors. This ensures consistently high performance and easy processing on a wide range of duct fabrication equipment. Building occupants benefit from less unwanted noise and more consistent temperatures for improved comfort.