An applicator for mixing and applying multi component compositions to a work surface such as two component surgical sealants while avoiding clogs preventing cross contamination of the components until a point of intended mixing at a location within the apparatus immediately upstream of an application opening in a tip cap decreasing pressure drop along the applicator to facilitate fluid delivery and increasing efficiency of mixing of the components. A luer hub sub assembly having a proximal hub and a distal hub an elongate four lumened cannula and a spray tip sub assembly are provided with interconnections between the sub assemblies preserving isolation of the fluid components from one another. The tip cap sub assembly includes registration structure to assure proper alignment between tip cap and tip insert. The end wall of the tip cap includes a spinner region with three feeder channels leading thereto the fluid components remaining isolated from one another in two of the feeder channels and initiating mixing with one another in a third of the feeder channels.
