4100 Installing A Cavity Sealing With 2-Component PU Cavity Foam
Cavity foam HS3 is available via the applicable BMW parts catalogue.
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.
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.
Available via the applicable BMW parts catalogue.
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).
Cavity foam HS1 is available via the applicable BMW parts catalogue.
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.
Properties of cavity foam HS1:
- 2-component PU foam, solvent-free.
- Excellent flow capacity enables complete seal 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 eye protection, solvent-resistant hand protection and protective clothing.
- Do not inhale.
Apply in well ventilated rooms only.
-
WARNING: Processing time after mixing process: within 8 minutes!
Completely empty open can after use.
- Residual 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 residual amount for several hours in cold water.
- Do not eat, drink or smoke while working with these products.
- Keep heat and ignition sources far away.
- Read the manufacturer's information on hazards/dangers (printed on the can) prior to application.
Processing instructions:
- Observe the expiry date on the cartridge.
Do not use spray can 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 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 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.
Available via the applicable BMW parts catalogue.
Hardened polyurethane foam can only be removed mechanically.
- Excess hardened polyurethane foam can be disposed of as residual waste.
Cans that are not entirely empty or are unused and have an expired expiry date are classed as hazardous waste.
Observe country-specific waste disposal regulations.
- Observe the manufacturer's processing instructions (printed on the can).