A low viscosity polymer enhanced water borne primer expecially formulated for EDPM and PIB roof surfaces. The first water base, low VOC primer of its kind, providing all the benefits of highly explosive solvent based primers without the dangers or air polution. Effectively cleans aged EDPM and PIB surfaces and permits reliable adhesion of repair materials. Especially designed for effective seam repairs utilizing Guardian Seamless Roof Coating and Heavy Duty Polymaster.