Home / Forums / Melodica construction, repair and maintenance / Hohner Professional 36 internal adhesive/sealant / Reply To: Hohner Professional 36 internal adhesive/sealant Reply To: Hohner Professional 36 internal adhesive/sealant January 28, 2015 at 1:43 pm #3873 Melodica-MeParticipant Just want to add. My professional 36 has a drain cap and has the single reeds, my Solist has no drain plug, drains from the rear via a button and has single reeds. melodica-Me