Precision Dip Coating utilizes a hybrid Polyolefin material supplied by Punda Mercantile. Plascoat PPA 571 has been specifically designed to provide a long lasting, tough coating for exterior applications to mild steel, galvanised steel and aluminum. It is based on an alloy of acid modified polyolefins. Therefore it is halogen free and the combustion fumes are low in smoke and have a very low toxicity index.

Plascoat PPA 571 is resistant to stress cracking, adverse weather conditions, detergents, salt spray and typical airborne pollutants. The coating maintains excellent adhesion to the metal substrate without the need for a separate primer. The material also provides a good degree of electrical insulation, abrasion and impact resistance.

* taken from Plascoat PPA-571 technical specifications

Recommended Coating Thickness 300-750 µ
Appearance Smooth/Glossy
Gloss ISO 2813 70
Impact Strength Gardner (drop weight) ISO 6272
Direct 23°C (3mm plate) 2.7 Joules
Indirect 0°C (3mm plate) 18.0 Joules
Gardner (drop weight) ISO 6272 > 27 Joules
Direct 23°C (0.7mm plate) 

Indirect 0°C (0.7mm plate)

> 27 Joules
Abrasion Taber ASTM D4060/84
H18, 500g load, 1000 cycles
60 mg weight loss
Salt Spray ISO 7253 Results after 1000 hours
Steel – Scribed Loss of adhesion less than 10mm from scribe. 

Under film corrosion 2-3mm

- Unscribed No loss of adhesion
Aluminium – Scribed No loss of adhesion
- Unscribed No loss of adhesion
Chemical Resistance* - Dilute Acids 60°C Good
- Dilute Alkali 60°C Good
- Salts (except peroxides) 60°C Good
- Solvents 23°C Poor
Adhesion PSL, TM 19 A-1
Weathering QUV ASTM G53-77 2000 hrs – No significant change in colour or loss of gloss.
Florida 45° facing South 3 years – No significant change in colour or loss of gloss.
Burning Characteristics
Ignitability BS476: Pt5: 1979 

500 micron coating

P – not easily ignitable
Surface spread of flame BS476: Pt7: 1979 

500 micron coating

Class 1
Fire Propagation BS476: Pt6: 1989 

500 micron coating

I = 0.2
Flammability UL94 Vo (see also Properties of Material)
Safe Working Temperature (Continuous in air) 60°C max