A syringe assembly that is pre-filled with two compounds. The two compounds are kept separate and are only mixed immediately before the compounds are ejected from the syringe. The syringe assembly has a syringe barrel. The syringe barrel defines an internal chamber where the two compound mix prior to ejection. Only one of the compounds is packaged within the syringe barrel. The other compound is introduced into the syringe barrel from a separate reservoir that is disposed within the syringe plunger. The second compound is released by twisting a reservoir tube within the syringe plunger.