How long does powder coating stock last for when kept in the carton?
Powder coating storage lives vary according to the technology and the storage conditions. Generally Dulux recommend 2 years before the powder is re tested to confirm no degradation in film properties. If the powder has become lumpy and or absorbed moisture, the material may be sieved and then fluidised for 10 minutes to condition the powder in preparation for application. If the powder has become too lumpy and solid, it would suggest some pre reaction of the powder which cannot be reversed nor corrected. Some technologies may have shorter storage periods, but these are generally outlined in the technical data sheets and / or product packaging. The same conditions for re testing the powder apply as above.
