Input paints in Energyplus

I am a new user of Energyplus and I get some problems on it. I have found the absorptance of different colours of paints for external coating but I do not know how to input the data in Energyplus. I have tried to input in the ‘Material’, however, it occurs error if I do not enter the density, conductivity and specific heat.
What can I do if I want to input paints on external walls in Energyplus?

I would find a similar construction from the construction library and use the values as reference.