Jimmy Fyffe earned Waterford a 0-0 draw with a stunning late penalty stop in a dramatic finish at Richmond Park.
A handball by substitute Darren Young from Glen Larsen’s throw appeared to give St Patrick's some reward with five minutes to play.
However Fyffe pushed Trevor Molloy’s penalty round a post, to give his side a point
Saints then had a goal disallowed before Daryl Kavanagh almost won it for Blues in stoppage time, but Saints’ keeper Barry Ryan tipped his cross onto the bar out for a corner.