Volkswagen Golf Service & Repair Manual: Paintwork system for plastic components

Issue 03.2010

This universal system allows simple and reliable painting of all external plastic components in standard applications. (Synthetic types: PP, EPDM, ABS, PC, PPO, PBTP, UP-GF, PA, PVC, R-TPU, PUR). This technical data sheet is not applicable for factory-primed plastic components.

Substrate

Preparing the substrate:

The substrate must be free of release agents. Before cleaning plastic parts, temper them for 60 minutes at +60 °C to sweat out the separating agents.
Clean with anti-static plastic cleaner -LKR 001 001 A3- or with the milder slow-drying silicone remover -LSE 20 100 A3-.

The effort required for cleaning depends on the type and quantity of the release agent used. It is recommended to use an emery pad to help in cleaning. Let the thinner evaporate completely (e.g. air-dry overnight at ambient temperature or for 30-40 minutes at +60 °C).

Before priming, clean lightly again using anti-static plastic cleaner -LKR 001 001 A3- or slow-drying silicone remover -LSE 20 100 A3-.

Paintwork structure for unprimed plastic components

Priming:

To ensure reliable adhesion plastics must be primed following thorough cleaning. There are two options:

1. -

Prime with 2-pack primer surfacer for plastics, white -LKF 696 009- or with 2-pack primer surfacer for plastics, black -LKF 696 040-. The 2-pack primer surfacer for plastics, white -LKF 696 009- and the 2-pack primer surfacer for plastics, black -LKF 696 040- can be recoated with top coat right away.

2. -	Prime with transparent adhesion promoter -ALO 822 000 10-, and then fill with elasticised 2-pack HS surfacer. Proceed with top coat and clear coat.

In case of damage:

Small scratches can be filled with 2-pack fine filler -LSP 784 002 A2- after priming.
Isolate the filled surface after sanding:

1. -	With 2-pack primer surfacer for plastics, white -LKF 696 009- or with 2-pack primer surfacer for plastics, black -LKF 696 040-.

2. -	Prime with transparent adhesion promoter -ALO 822 000 10-, and then fill with elasticised 2-pack HS surfacer. Proceed with top coat and clear coat.

For information on the application instructions, flash-off times and drying times, refer to the technical data sheet:

→ Chapter „2-pack plastic adhesion surfacer“

→ Chapter „Adhesion promoter (transparent)“

→ Chapter „Top coats“

→ Chapter „Clear coats“

Use of 2-pack elastic additive -ALZ 011 001- in 2-pack HS surfacers:

15% on semi-rigid and rigid plastics

30 % on highly flexible plastics

Refer to technical data sheet of the respective surfacer for information on the application → Chapter.

Note Painted plastic parts must not be cleaned with a high-pressure cleaner during the first 6 weeks. After this period, the nozzle must be held at a distance of no less than 30 cm from the object.

One-coat painting

Top coat:

Mix 2-pack HS top coat with 15% 2-pack elastic additive -ALZ 011 001-, and then cross-link this mixture.

Mixing ratio 3:1 with 2-pack VHS hardener and 15% special 2-pack thinner -LVM 009 200 A2-.

Application:

Apply in one-and-a-half coats.

Air dry overnight at +20 °C, or after 5-10 minutes of final flash-off time for 30-40 minutes at +60 °C. If 2-pack elastic additive -ALZ 011 001- is used, the drying times are longer.

Two-coat paintwork - non-metallic, metallic, pearls

Base coats:

Waterborne base coat with 10% demineralised water -LVW 010 000 A5-.

Application:

Apply in one-and-a-half coats.

Clear coats:

Mix 2-pack HS clear coats with 2-pack elastic additive -ALZ 011 001-.

Application:

According to relevant technical data sheet for the clear coat → Chapter „Clear coats“.

Drying:

Air dry overnight at +20 °C, or after 10 minutes of final flash-off time for 40-45 minutes at +60 °C. If 2-pack elastic additive -ALZ 011 001- is used, the drying times are longer.

Painting satin-gloss colour hues

One-coat painting; top coat:

Mix 2-pack HS top coat at a ratio of 1:1 with 2-pack matting additive -ALN 775 106-, and then cross-link this mixture.

Mixing ratio 4:1 with 2-pack VHS hardener and 15% special 2-pack thinner -LVM 009 200 A2-.

Application:

To achieve a uniform paint film surface, apply 2 spray passes with 5-10 minutes interim flash-off time.

Drying:

Air dry overnight at +20 °C, or after a final flash-off time of 5-10 minutes for 30-40 minutes at +60 °C.

Painting colour shades with textured effect

One-coat painting; top coat:

Mix 2-pack HS top coat at a ratio of 1:1 with 2-pack coarse/fine texture additive -ALN 775 107/108-, and then cross-link this mixture.

Mixing ratio 4:1 with 2-pack VHS hardener and 15% special 2-pack thinner -LVM 009 200 A2-.

Application:

2 spray passes:

1. Normal spray application, 5-10 minutes flash-off time

2. Spray application adapted to desired texture

Air dry overnight at +20 °C, or after a final flash-off time of 5-10 minutes for 30-40 minutes at +60 °C.

Personal protective equipment:

Adhere to the safety data sheet.

Wear personal protective equipment during application.

Paintwork system for plastic components

Issue 03.2010

Substrate

Preparing the substrate:

Paintwork structure for unprimed plastic components

Priming:

In case of damage:

Use of 2-pack elastic additive -ALZ 011 001- in 2-pack HS surfacers:

One-coat painting

Top coat:

Application:

Two-coat paintwork - non-metallic, metallic, pearls

Base coats:

Application:

Clear coats:

Application:

Drying:

Painting satin-gloss colour hues

One-coat painting; top coat:

Application:

Drying:

Painting colour shades with textured effect

One-coat painting; top coat:

Application:

1. Normal spray application, 5-10 minutes flash-off time

2. Spray application adapted to desired texture

Personal protective equipment:

Test yourself