41 00... Installing A Cavity Acoustic Baffle With 2-Component PU Cavity Foam

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: The cavity foam may only be use for cavity sealing at the points at which cavity sealing is present as standard!

The following repair represents the replacement of a shaped part for the cavity seal by the use of cavity foam.

This type of cavity sealing is used at points at which shaped parts cannot be used for repairs.

This is the case when large amounts of heat occur (e.g. due to welding, soldering or tin-plating) in the direct vicinity or at the point of the standard cavity sealing.

It is not possible here to install shaped parts for the cavity seal because of the fire risk!

To replace shaped parts with cavity foam at further locations, adopt the procedure shown here and adapt it to the relevant conditions.

It must be ensured that the cavity is completely sealed off.

NOTE: Check the accessibility for the spraying pipe of the cavity foam to the affected cavity after removing the damaged part.

Properties of cavity foam:

2-component PU foam, solvent-free.
Excellent flow capacity, enabling complete sealing of cavities.
Good strength, preventing slipping in cavities.
Low water absorption, preventing corrosion.
Ideal for use as insulating and sealing compound.

Information on dangers/hazards:

Avoid eye and skin contact.
Wear protective goggles, solvent-resistant protective gloves and protective clothing.
Do not inhale.
Apply in well ventilated rooms only.
WARNING: Application time after mixing: within 8 minutes !

Completely empty open can after use.
Remaining amounts which are not used can cause the can to explode on account of a chemical reaction (buildup of heat)!
Alternatively, cool the can containing the non-removed remaining amount for several hours in cold water.
Do not eat, drink or smoke during this operation.
Keep heat and ignition sources well away.
Read the manufacturer's information on hazards/dangers (printed on the can) prior to application.

Application instructions:

Use by date on can.
Do not use the spray can after the Use by date on the can has expired.
Cavity sealing of repair area possible after an air drying time of 1 hour.
Backing surface must be
clean and free from

dust,

grease,

oil and stripping agent.
Application temperature at least 15°C. Optimally 20°C.
IMPORTANT: Foam expands many times over as it sets (change in volume).
Before applying to the vehicle, fill a clearly visible cavity of corresponding size with foam on a used part.
This enables an optimal dosage (i.e. spraying time) to be specified for filling the cavity on the vehicle with foam.
Tape off open passages to visible areas with adhesive tape to prevent foam from escaping.
Setting takes approx. 30 minutes. Mechanical processing (e.g. drilling, cutting, etc.) is then possible.
Cavity sealing of repair area possible after an air drying time of 1 hour.
Remove fresh, non-hardened PU foam with adhesive cleaner 208.
Hardened PU foam can only be removed by mechanical means (machine).
Excess, hardened PU foam can be disposed of as residual waste.
Cans which are not entirely empty and unused whose Use by date has expired are classed as hazardous waste.

Observe country-specific waste-disposal regulations.
Observe the manufacturer's application instructions (printed on the can).