Special soundproofing shims designed with shape and material to lock in firm position, safe and especially silent, unstable manholes cover of underground networks and urban services.Everyone is familiar with the annoying problem of the strong, continuous noise emitted from the manhole covers as a result of the passage of vehicles. Age, wear, bad support and the great impact force of the wheels cause this problem that was solved with improvised and primitive systems by inserting between the cover and frame pieces of rubber or segments of old tires inner tubes etc, The shims are not simple “nooks of plastic“ but are manufactured in a polyurethane of high quality with particular non symmetrical configuration and a wedge-shaped plan designed to stop the excursion in every direction. Shims are the modern solution to eliminate the flicker, and completely avoid the noise, the cover “floats” resting on the plastic shims and ensuring the best function and respect for the environment.
Molded injection in special polyurethane resistant to compression, time, sun, moisture, wear and temperature excursions (+60°C / -40°C)
Are reusable and have die cuts for cutting in two half and double thickness