Cavity Wax Injection

Fitting Approved Accessories It should also be noted that new panel assemblies and When fitting accessories it is important that the body shells are supplied without wax injection vehicle’s corrosion protection is not affected, either by treatment which must be carried out after repairs. breaking the protective coating or by introducing a moisture trap. Effective cavity wax protection is vital. Always observe the following points: DO NOT screw self-tapping screws directly into the body panel but fit plastic inserts first. Protect the edges of holes drilled into panels, chassis members and other body parts with a suitable zinc rich or acid etch primer, followed by a protective wax coating brushed onto the surrounding area.

DO NOT affix unpainted metal surfaces of any accessory directly to the vehicle bodywork unless they are suitably protected. Where metal faces are bolted together always interpose a suitable interface material such as weldable zinc rich primer, extruded strip or zinc tape.

Cavity Wax Injection

Box sections treated with cavity wax are shown in this section. Repairs affecting these areas must include re-treatment with an approved cavity wax, using the access points ilustrated. In addition, all interior surfaces which have been disturbed during repairs must be wax injected whether they have been treated in production or not. This includes all box members, cavities, door interiors etc. It is permissible to drill extra holes for access where necessary, provided these are not positioned in load-bearing members. Ensure that such holes are treated with a suitable zinc rich primer, brushed with wax and then sealed with a rubber grommet.

Prior to wax injection, ensure that the cavity to be treated is free from any contamination or foreign matter. Where necessary, clear out any debris using a compressed air supply.

Carry out wax injection after final paint operations. During application, ensure that the wax covers all flange and seam areas and that it is applied to all repaired areas of both new and existing panels.

• NOTE: Apply cavity wax AFTER the final
• paint process and BEFORE refitting of any
• trim components.

• Complete all finish paint operations before wax application.
• Clean body panel areas and blow-clean cavities if necessary, before treatment.
• Maintain a temperature of 18˚ C during application and drying.
• Check the spray pattern of injection equipment.
• Mask off all areas not to be wax coated and which could be contaminated by wax overspray.
• Remove body fixings, such as seat belt retractors, if contamination is at all likely.
• Move door glasses to fully closed position before treating door interiors.
• Treat body areas normally covered by trim before refitting items.
• Check that body and door drain holes are clear after the protective wax has dried.
• Keep all equipment clean, especially wax injection nozzles.