PercoTop 2K Chromate-Free Wash Primer CS305

PercoTop® CS305 is an acid-curing etch primer on a polyvinyl butyral (PVB) resin basis developed to provide exceptional corrosion resistance. Its formulation ensures it promotes excellent adhesion even on difficult substrates such as stainless steel. And it is ideal as a passivating pre-treatment for a wide range of metals from aluminium and steel, to galvanic and sendzimir zinc coated steel. CS305 dries quickly and has good hiding power. Application is easy with all traditional
application equipment including electrostatic.

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Product description

SUBSTRATES

Substrates:
  • Aluminium and unpolished stainless steel.
  • Mixed constructions of different materials, including steel, stainless steel, aluminium and galvanised steel.
   
Surface preparation:

Substrates must be free from all contaminants.  

   

PRODUCT PREPARATION

Activator: CS709 PercoTop® Activator Wash Primer
   

Mixing Ratio:

  • 1 : 1 by Volume
   
Pot Life at 20°C:

8 hours

Once mixed, the material should be applied the same day.

   

 

 APPLICATION

Method of application Application viscosity
DIN 4 mm, +20°C,
Thinner Nozzle Pressure
bar
Number of coats
Gravity / Suction feed 15-16 s as mixed 1.3-1.4 mm 2.5-3 2
HVLP 15-16 s as mixed 1.3-1.4 mm 2-2.5  2
Airless / Airmix 15-16 s as mixed 0.23 mm 2-3 Air
ca.80-100
Material
1
 Pressure pot / Membrane pump 15-16 s as mixed 1-1.1 mm 2.5-3 Air
1-2
Material
2
Electrostatic According to the advice of the technical representative
Recomended film thickness /dry/ 8 -12 μm

 

DRYING

Air drying at 20°C: 2 hours
   
Forced drying Flash time: 10-15 minutes
Drying time: 30 minutes
Drying temperature: 60 °C object temperature
   
IR drying:

Medium wave: 15-20 minutes
Short wave: 10-12 minutes (at 50% power)