Printastic,
Based on your post, it appears you are simply trying to apply a coating to the sheet, full coverage, not spot coating. Tec equipment is a simple roller coater, no anilox cylinders, no plate system for Photopolymer plates (CYREL™), short dwell time between coating application and the lamp system. The comment made about flow time is correct, it is not something you can change on the Tec coating, except by slowing down the speed (you could try that and see if thing improve). However, there are several other potential causes. Since you indicate the problem exists both on image and non-image areas, the surface tension of the coating may not be low enough to speed the wetting on the ink (or toner), or the substrate. Reducing the surface tension of the coating could help. Heating the coating, modestly, will reduce the viscosity and help flow, just be cautious to keep the temperature under under 110℉ and watch for spot heat which can cause the coating to begin to polymerize. You might ask Tec to provide an answer, but they do not formulate or manufacture their own coatings, so perhaps they can have someone from their vendor provide advice. Finally, speak with other UV coatings manufacturers, they might have an alternate product that will solve your problem. BTW, what type of print are you trying to coat? If digital, what Print Engine. If conventional, what press, whose inks? What substrate? Let me know if I can assist. Good luck.