Adding a layer type on wall build up

Hi,

I am a newbie on the software and I would appreciate your help.

I am trying to calculate the U-Values of an existing external wall for a residential property. The insulation I need to add is kingspan kooltherm K118 however the software doesn't have any kingspan insulation. How could I add additional Layer types/new insulations? Assuming I do have the thermal conductivity, thermal resistance, vapour resistivity etc.

Thank you,

Kostas