Dynamat Extremeliner.

Contents (1) 24" x 36" x 0.5" (1) 609mm x 914mm x 13mm* piece of Extremeliner. Use in the passenger compartment on floors, firewalls, rear decks and inside subwoofer enclosures. For high heat areas, Extremeliner is most effective when applied over Dynamat Xtreme. Extremeliner is not recommended for roofs and behind trim panels. For these areas, use Dynaliner or TacMat.

Extremeliner is the ultimate low-frequency attenuator. Extremeliner is a four-part composite barrier consisting of 1/8 inch layer of neoprene, 15 mils of acoustic lead barrier, 1/4 inch layer of high efficiency acoustic foam and a 3 mil urethane top facing. Extremeliner works anywhere on your vehicle's floor and firewall for the ultimate barrier against road and engine noise.