Notes on component bonding with adhesive tape (M4 2021-2023)

WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.

Unless specified otherwise in vehicle-specific or component-specific instructions, the following notes apply.

Follow REPAIR NOTES FOR BONDED SEALS .

General notes
- Bonding at room and object temperature of >+18°C.
- Newly painted parts may only be bonded after a drying time of at least 24 hours.
- Optimal bonding/attachment to the background surface is achieved after approx. 48 hours.
  Components must not be exposed to mechanical strain beforehand (car wash, strength test, etc.).
- Do not touch bonding area.
- It is not the length of time that pressure is applied but rather the force of pressure applied that is crucial.
- Detaching the adhesive tape after pressing destroys the adhesive layer.
Auxiliary materials and tools
- CLEANING AGENT R1 OR CLEANING AGENT R2 .
- SIKA ACTIVATOR 205 .
- Fluff-free cleaning cloths
- Pressure roller
Preparations
- Remove all adhesive residue or clean new part thoroughly
- Clean the areas to be bonded immediately before bonding to remove silicone and grease residues.
- Treat bonding on glass or painted surfaces with SIKA AKTIVATOR-205 .
  NOTE: APPLY SIKA AKTIVATOR-205 extremely thinly. It must not be coated beyond the bonding surface.
  Note air drying time >1 minute.
Bonding
1. Components without preassembled adhesive tape
  - Detach liner* from adhesive tape
  - Position adhesive tape on component and stick on
  - Press down adhesive tape over entire adhesive area
  - Continue with Point 4.2
    * Liner is the protective film on the adhesive tape.
2. Components with pre-fitted adhesive tape
  - Detach liner* from adhesive side (if adhesive area is large, do not detach liner completely)
  - Align component in correct position on vehicle
  - Press down component over entire adhesive area
    Minimum contact pressure > 15 N/cm² (firm thumb pressure reaches approx. 35 N/cm² .)
    
    * Liner is the protective film on the adhesive tape.