Page 313 - Wurth Total Catalogue

SPRAY POLYESTER FILLER - DIRECTIONS FOR USE

Preparations:
The surface must be clean, dry and grease free. Maximum adhesion is achieved on well sanded surfaces.

Mixing Instructions:
Before using, the filler should be thoroughly and carefully stirred. The mixing ratio must not exceed 3.5 (by weight) of the hardener to 100 parts of the filler.

Thinners:
The viscosity of the filler is ready for spraying. Should a lower viscosity be required, especially for a final application to obtain an even smoother surface,
thinners can be added, maximum 2.5% (by weight).

Spray Application:
Use a gravity fed spray gun with a nozzle diameter of 2 - 3.5mm and an air pressure of approximately 3 to 4 bar (45 -60 PSI). Ambient room temperature
should be 18 - 20°C . The filler should be applied “wet on wet” although sufficient time must be allowed for the previous coat to “flash off” and enable the
next coat to be applied without runs.

Cleaning:
It is important that the spray gun is cleaned with NC thinners within the pot life of the filler.

Working time:
The working time is between 20 and 30 minutes at normal application temperature.

Hardening Time:
At 20°C the filler will harden between 3 to 5 hours before the surface can be sanded. Higher temperatures will shorten the hardening time, colder
temperatures will lengthen the time, approximately as follows:

Temperature 40°C 60°C 80°C
Hardening Time 60 minutes 30 minutes 15 minutes

Sanding:
Polyester Spray Fillers are not water resistant therefore dry sanding is strongly recommended.

100 3.5

3.5 % hardener 20 min. /20°C profile 120 - 180 min. /20°C. P 80 - 240

Special Instructions:
To avoid any possibility of paint coats blistering (since all polyester filling materials are moisture sensitive) the spray filler should be sealed.
For this purpose use an isolating primer such as 2 component acrylic or epoxy primer over the top.

AUS. pub. 07/15 ©

05 3502