Application and Substrate Temperatures

Spraying pre-warmed surfaces enables excellent bonding films to be produced. Spraying at high pressures should be avoided, as this will cause powdering of the bonding film. 

Metal parts can be pre-heated to 40 - 70 °C depending on the heat sink characteristics of the component. Several light passes with a spray gun produce a better film than one heavy application. If higher temperatures are used it is of the utmost importance that the component surface is wetted and not dry sprayed. The surface should remain wet for at least 5 seconds to allow complete wetting of the substrate. The primer will be dry after 30 - 45 seconds when the top coat can be applied. The topcoat may be applied to surfaces preheated to 40 - 60 °C. Air temperatures in a drying tunnel up to 120 °C may be used provided the component temperature does not exceed 80 °C. The top coat should dry within a minute. 

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