Installing A Cavity Sealing With 2-Component PU Cavity Foam (HS3) (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)

SOURCING REFERENCE for cavity foam HS3 .

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

The following repair represents the replacement of a shaped part for the cavity sealing 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 sealing 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 ratios.

It must be ensured that the cavity sealing is fully completed.

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

Properties of cavity foam HS3:

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

Information on dangers/hazards:

Avoid eye and skin contact.
Wear eye protection, solvent-resistant hand protection and protective clothing.
Do not inhale.
Apply in well ventilated rooms only.

WARNING: Processing after the mixing process within a few seconds!
Do not eat, drink or smoke while working with these products.
Keep heat and ignition sources far away.
Observe the manufacturer's information on dangers/hazards prior to application (imprint on double cartridge).

Processing instructions:

Observe the expiry date on the cartridge.

Do not use cavity foam after the expiry date has passed. After the Use by date the properties of the cavity foam will no longer meet the requirements of the BMW Group.

Cavity sealant of the repair area possible after an air drying time of 1 hour.
Surface must be clean, free of dust, grease, oil and separating agents .
Application temperature at least 15°C. Optimally 20°C.
IMPORTANT: Foam expands during hardening (volume change).
Tape off open passages to visible areas with adhesive tape to prevent foam from leaking.
The setting takes approx. 30 minutes. Mechanical processing (e.g. drilling, cutting, etc.) is then possible
Cavity sealant of the repair area possible after an air drying time of 1 hour.
Remove fresh, non-hardened polyurethane foam with adhesive remover 208.
Sourcing reference, see BMW Group parts sales.

Hardened polyurethane foam can only be removed mechanically.
Excess hardened polyurethane foam can be disposed of as residual waste.
Double cartridges that are not entirely empty or are unused and have an expired expiry date are classified as hazardous waste.

Observe country-specific waste disposal regulations.
Observe the manufacturer's processing instructions (imprinted on double cartridge).