Damping sheet, yomwe imadziwikanso kuti mastic kapena damping block, ndi mtundu wa zinthu za viscoelastic zomwe zimamangiriridwa mkati mwa thupi lagalimoto, lomwe lili pafupi ndi khoma lachitsulo la thupi lagalimoto.Amagwiritsidwa ntchito kwambiri kuchepetsa phokoso ndi kugwedezeka, ndiye kuti, kutsitsa kwenikweni.Magalimoto onse ali ndi mbale zonyowa, monga Benz, BMW ndi mitundu ina.Kuphatikiza apo, makina ena omwe amafunikira mayamwidwe owopsa ndi kuchepetsa phokoso, monga magalimoto apamlengalenga ndi ndege, amagwiritsanso ntchito mbale zonyowa.Mpira wa Butyl umapanga zojambula zazitsulo za aluminiyamu kuti zipange zinthu za rabara zonyowetsa galimoto, zomwe zili m'gulu la mayamwidwe onyowa komanso owopsa.Katundu wonyezimira kwambiri wa mphira wa butyl umapangitsa kukhala wosanjikiza wochepetsera mafunde ogwedezeka.Nthawi zambiri, zida zachitsulo zamagalimoto zimakhala zoonda, ndipo ndizosavuta kupanga kugwedezeka pakuyendetsa, kuyendetsa mwachangu komanso kugundana.Pambuyo pakunyowetsa ndi kusefa kwa mphira wonyowa, mawonekedwe a waveform amasintha ndikufowoka, kukwaniritsa cholinga chochepetsera phokoso.Ndi chimagwiritsidwa ntchito Mwachangu galimoto phokoso kutchinjiriza zakuthupi.