41 00... Bonding Steel Parts

Overview of topics: 

1. Equipment
2. Expiry date of adhesive
3. Grinding and cleaning
4. Gluing coat
5. Hardening times
6. After treatment of bonding surfaces
7. Disposing of adhesive

1.0 Equipment 

• Emery paper
• Cleaning agent: Isopropanol, acetone or spirit
• Adhesive cartridge (sourcing reference via BMW Parts Service picture board Aluminum and steel/bonding and welding)
• Adhesive gun (standard cartridge gun)
• Spatula for applying adhesive

2.0 Expiry date of adhesive: 

• The adhesive cartridge is marked with a date.
• Do not use the adhesive after this date.

3.0 Grinding and cleaning: 

• For better adhesion, remove oxide film, rust, paint and scale from the adhesive areas with a wire brush or emery paper.
• Clean adhesive areas with isopropanol, acetone or spirit.
• Allow cleaned surfaces to dry for approx. 5 minutes.

Adhesive areas must be completely dry.

4.0 Adhesive application: 

• Processing temperature of adhesive cartridge 15-25°C.
• Insert adhesive cartridge in adhesive gun, remove cap and allow both adhesive components to emerge. Strip adhesive components uniformly and attach mixing tube.
• Allow approx. 10 cm of mixed adhesive to emerge and then apply the mixed adhesive first on one side of the adhesive area.
• After applying the adhesive, check whether an adhesive component has emerged at the back of the cartridge. If yes, break off the bonding procedure. Clean new component. Use new adhesive cartridge. Contact national hotline.
• Use a spatula to spread the adhesive over the adhesive area. Thickness of layer approx. 2 mm (dependent on adhesive gap).
• Potlife of mixed adhesive approx. 2 hours. A change of mixer is only necessary if over a period of 1 hour no material has flowed through the mixer.
• Join, secure and rivet and/or weld new parts in accordance with repair instructions.
• Remove excessive glue with paper or cloths.

5.0 Hardening times: 

The hardening time is:

• Either 48 hours at a minimum of 15°C (room temperature) up to vehicle operational strength.
• Or 1 hour in the spraying booth (booth temperature 80°C/ object temperature 60°C) up to vehicle operational strength.
• Do not use radiant heaters for hardening. Risk of adhesive being destroyed at temperatures of ≥ 120°C.
• Do not apply load to glued parts until they have hardened!

6.0 After treatment of bonding surfaces: 

• Seal all bonding surfaces with cavity sealant.

7.0 Disposing of adhesive: 

• Small amounts of mixed and hardened adhesive residue can be disposed of as domestic waste.

These regulations apply to the Federal Republic of Germany. 

For other countries, comply with the (possibly differing) nationally applicable regulations.