I installed the new rear main seal using this set up from the FelPro gasket kit for the side seals. It consists of two pipe cleaners that you are supposed to dip in water. First, you fill the side cavities of the retainer with silicone, then push the wet pipe cleaners into the slot. It's supposed to cure the silicone since it requires moisture (never knew this). The first time I installed this, I just filled the cavities with silicone and nothing else. A week later, it was still as wet as the day I did it. So, maybe they know what they're talking about? I hope so, I don't want to pull it apart again...especially when it's in the car...