Ferrari 458 Italia, Technical Documentation Manual

Page: 32 / 2012

1.8 Expanded foam
Expanded foam parts are used to reduce interior noise and
prevent condensation and exhaust gases from entering the
passenger compartment. In the production process, the cavities
in certain areas of the bodywork are compartmentalised by
using expanded foam components and applying heat to the
bodywork.
During vehicle production, strips of sealant, in various widths
and thicknesses, are inserted into the box section cavities.
These expanded foam parts are optimally moulded to the shape
of the box section cavities by heating the bodywork to approx.
180 °C. This separates the individual box section cavities.
However, as the bodywork may not be heated to this extent
during a repair, different procedures have been established for
different cases:
Bicomponent expanded foam sealant
The cavities are filled with a bicomponent foam sealant. The
foam sealant must form a closed-cell seal. The closed-cell
seal prevents moisture from penetrating the area concerned.
Foam sealant is applied via existing holes. Only areas that
were foamed-in-situ at the manufacturing plant may be refilled
during a repair.
Single component permanently elastic adhesive mastic
This material is applied in very narrow repair areas, and in the
outer skin area in particular. For example, on the Ferrari F458
Italia, this is used to hermetically seal the underdoor panel.
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