Polyurethane powder coating is recommended for use in exterior situations when lower film builds with superior flow are particularly important. Specialised versions are available where high surface hardness is required, e.g. anti-vandal coatings, stain resistant coatings. This type of coating is popular with petrochemical companies.
Properties
| Mandrel bend | BS3900 E1 | Pass 6mm |
| Scratch | BS3900 E2 | Pass 4kg |
| Impact | ASTM D2794 | Pass 80in/Ib |
| Adhesion | BS3900 E6 | No detachment |
| Humidity | BS3900 F2 | Pass 1000 hrs: no blistering |
| Salt Fog | ASTM B117 | Max. 2mm creep @ 500 hrs |
| Erichsen indentation | 8-10mm | |
| Exterior exposure | 12 months | Excellent gloss and colour retention |
| QUV 'B' exposure | 200 hrs | Minimal change |
Typical Uses: