Datasheet

Page 4
After the draining operation is complete, the boards should be placed in an air-circulating drying cabinet
following the curing schedule highlighted on page 4.
Brushing
Ensure that the coating material has been agitated thoroughly and has been allowed to settle for at least 2
hours. The coating should be kept at ambient temperature. After the brushing operation is complete, the
boards should be placed in an air-circulating drying cabinet following the curing schedule highlighted on page 4.
Drying Times and Curing Conditions
The properties gained from DCB are dependent on the curing schedule employed. It is essential that the
coating be allowed a minimum of two hours drying time at ambient temperature prior to any heat curing. This is
necessary to allow the solvent system to evaporate.
Ambient Ambient curing is via solvent evaporation only. Eliminating the heat curing step will reduce
solvent resistance. Other properties, such as resistance to humid and corrosive environments,
may also reduce but still meet the requirements of many industry standards. Coated boards
should be left at room temperature for the solvent to evaporate; extraction is required in the
curing area.
Commercial Most commercial users will gain satisfactory performance from this coating by curing for two
hours at 90°C after the two-hour ambient cure. This will give limited resistance to solvents.
Military If the assemblies are to be used under conditions of high temperature or be exposed to
extremes of thermal cycling, the coating should be cured for 12 hours at ambient followed by 24
hours at 90°C. For maximum solvent resistance cure at 2 hours at ambient followed by 24
hours @ 120°C. This curing schedule will give resistance to the more aggressive solvents.
It is recommended that the coating be thoroughly cured on circuits, which have design areas of very high
impedance that require adjustment after application.
Revision 4: January 2019