powder coating
Powder coating is a metal coating method that is applied as a dry, free-flowing powder. In contrast to traditional liquid paint, which uses an evaporating solvent, powder coating is generally applied electrostatically and then cured using heat or ultraviolet light. The powder can be made from either thermoplastic or thermosetting polymers. This technique is commonly employed to achieve a thick, resilient finish that offers greater durability than standard paint. We can offer custom flashings in a single or double sided powder coated finish in aluminium or galvanised steel of 2mm gauge and above. We can also provide custom powder coated 0.7mm single skin galvanised profiled cladding sheets. Powder coating is a finish that is applied after manufacture, unlike our other coated finishes which are coated in coil or sheet form as raw material. As such powder coated finishes are applied directly to the base metal so no primer coat will be applied underneath. Powder coating is usually single sided (applied to the weather face of the product) The reverse side of the product will be the base metal and the powder coated item will usually experience some bleeding of the top finish at the edges on the reverse. If you require a bespoke colour or would prefer to explore the option of powder coated sheets and flashings please contact us to discuss your requirements.
finish properties
finish property | value | test standard |
|---|---|---|
adhesion | Gt 0 | ISO2409:1992 (2mm) |
indentation | min 80 | ISO2815:1973 |
mandrel bend | no cracking or detachment | ISO1519:1995 (5mm) |
impact | no cracking or detachment | ASTM D2794 1969 (2.5Nm) |
kesternich | max 1mm corrosion creep from scribes | ISO3231:1993 (0.21.S02-24 cycles) |
acetic acid salt spray | max 16mm² over 10cm length of scribe | ISO9227:1990 (1000 hrs) |
accelerated weathering | loss of gloss max 50° of original value | ISO1341:1994 luminous intensity 550 W/m² (290-800Nm) |
weathering | residual gloss >50% of original (min) | Florida 5° south facing 1 year (ISO2810:1974) |
resistance to mortar | no residue after removal | ASTM B3260 (24 hours) |
resistance to boiling water | no defects or detachment | 2 hours deionised water or 1 jour pressure cooker |
condensed water | no blistering | DIN50017:1982 (100 hours) max 1mm under film creep |
sawing, milling, drilling | no cracking or chipping | |
cupping test | typically 7 to 9 min | ISO1 520:1995 (5mm min) |
Substrate used for testing was aluminium alloy AA5005-H24 with a gauge of 0.8mm pre treated according to DIN 50939:1998
Coating complies with requirements for Class 0 as defined in approved document B "fire safety" to the building regulations 2000.
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Please feel free to call us on 01902 937651 during office hours to discuss your requirements
