L322 Range Rover Service Procedures
CORROSION PREVENTION AND SEALING
STRUCTURAL SEALING
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Expanding foam acoustic seals
Expanding foam seals numbers 1 to 10 are fitted to various sections of the body side panel, bodyside closing and
bodyside inner panel. Seal numbers 11 and 12 are fitted inside the rear longitudinals.
Expanding foam acoustic seals are used in various closed sections of the body to improve vehicle refinement. The
seals expand during the factory paint process, thus locking them into position. The seals are used in various locations
throughout the vehicle.
The main function of the seals is to insulate the cabin from noise and vibrations, particularly road noise. They are
located such that they prevent noise accentuation along a section and also reflect air borne noise away from the cabin.
A secondary function of the seals is that the internal sections are sealed from the infiltration of water, air, dust and
gases.
Another advantage of the seals is that they marginally increase the overall stiffness of the body and its structural
performance in case of a crash.
The seals are manufactured from an expandible synthetic rubber, `Betacore 4300`.
