Ferrari 458 Italia Technical Documentation Manual page 32

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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

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.