I squirt a blob the size of a dried pea on the side of my left index finger, then roll each plug to make a circular coating around the nut, then again around the corrugations. The circle around the nut is to inhibit corrosion, and the circle around the corrugations keeps water out and allows the rubber boot to release down the road. One dried pea's worth will usually do 6 to 8 plugs. I do this wearing gloves even if I wasn't already wearing them because it's a pain cleaning it off of skin.