Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Application of bonding agent
The bonding agent is used for adhesion between glass or ceramic glass and the adhesive. Therefore, a thin, homogeneous and continuous line of bonding agent must be applied.
After compressing the adhesive bead, make sure that there is 1 to 2 mm wide bonding agent trace is on the ceramic glass next to the adhesive bead (serves visual inspection).
The adhesive bead may become up to 15 mm wide in compressed condition. The width of the adhesion agent is therefore at least 17mm with windscreens and rear windows and at least 9 mm with door window glass.
The bonding agent may not be applied in the visible area or the point grid. Fresh bonding agent in the visible area must immediately be wiped off with solvent because hardened bonding agent will leave a haze behind.
| Graphic A | Graphic B |
|---|---|
| Window glass with cover If the adhesive bead (1) cannot expand further (a = 0 mm) into one direction when pressing down, the outer edge of the bonding agent bead (3) will run through Point a. |
Window glass without cover. If the adhesive bead (1) can expand into both directions while pressing down, the bonding agent (3) and adhesive bead (2) will run toward each other in the center (m). |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.