4100 Bonding Steel On Steel

IMPORTANT: These repair instructions apply to structural components.
Such components include engine mounts, A-pillars, B-pillars, etc.
Follow the vehicle-specific repair instructions.
Only use the repair procedures described there.
Conform with safety regulations! Refer to 4100 INFORMATION ON HAZARDS and 4100 SAFETY AT WORK

Overview of topics:

Equipment
Preparing the surface
Bonding coat
Hardening times
Subsequent treatment

1.0 Equipment
- Sandpaper
- Refer to CLEANING AGENT R1
- Refer to CLEANING AGENT R2
- Refer to ADHESIVE K1
- Refer to CARTRIDGE GUN
2.0 Preparing the surface:
- Remove coarse dirt from the bonding surfaces using solvent cleaner R2.
- Clean bonding surfaces using R1 solvent cleaner prior to sanding.
- Remove paint from bonding surfaces using a wire brush or sandpaper with 120 graining.
- Clean bonding surfaces with CLEANING AGENT R1 .
- Allow cleaned surfaces to dry for approx. 5 minutes.
  Bonding surfaces must be completely dry.
3.0 Adhesive application:
- Processing temperature of glue cartridge 18°C - 30°C.
- Object temperature, vehicle and new parts, min. 15°C
- After applying the adhesive, check whether an adhesive component has emerged at the back of the glue cartridge. If yes, break off the bonding procedure. Clean new part. Use new glue cartridge. Contact national BMW hotline.
- Join components and secure in position.
- Remove excess adhesive. Do not use solvent cleaning agents.
4.0 Hardening times:
- Refer to NOTES REGARDING ADHESIVE K1
5.0 Subsequent treatment of bonding surfaces:
- Protect the repair area with CAVITY SEALANT .