Volkswagen ID.4: Corrosion protection
Volkswagen ID.4 (E21) 2021-2025 Service Manual / General information - Body / Corrosion protection
Corrosion protection for attachments and welded components
- Immediately prime bare metal spots after repair.
- Always remove burrs from drill holes.
- Always apply welding primer/structural adhesive (according
to vehicle-specific body repair workshop manual ) on both
sides of welding flanges.
- Prime seam areas from the inside and outside before sealing
them.
- Apply sealant only on panel parts coated with primer.
- Use sealant to completely seal overlapping panels, edges,
butt joints, weld seams etc.
- Weld seams must not be ground, as otherwise the strength
of the weld seam will be impaired.
- Establish paintwork structure as described in paintwork manual
⇒ General information, paint; Rep. gr. 54 ; General
notes; Paintwork structure in aftersales .
- Restore the underseal using long-term underseal material.
- Seal cavities in repair area after top-coating.
- Separating cuts (e.g. in side panel) must be sealed completely.
- After the cavity sealant has dried, clear the water drains.
Cavity sealing
Important
- Before starting work it is important to consult the safety data
sheets for information on safety measures.
- Even for products which are not required by law to be labelled,
the usual safety measures for chemical products must
be observed.
- Functional parts, e.g. brake systems, exhaust systems, rubber
and plastic parts, must not be sprayed.
- Preservative which drips out can be easily wiped away.
- The approved plastic cleaner is suitable for removing dried
material.
- Larger areas may be cleaned with a high-pressure steam
cleaner. Splashes on painted surfaces should be removed
immediately.