Here is the final comment on the primary chain case leak:
RTV stands for Room Temperature Vulcanization.... which means the thermoset silicone compounds must cure at room temperature. There are also LTV and HTV for the kinds of thermoset silicone compounds that cure at Low or High temperatures.
Room Temperature Vulcanization refers to a specific curing process involving room temperatures (65 to 75 degrees F). It is a chemical process in which polymer molecules are linked to other polymer molecules by atomic bridges composed of sulfur atoms. The end result is that the springy rubber molecules become cross-linked to a greater or lesser extent. This makes the bulk material harder, much more durable and also more resistant to chemical attack. It also makes the surface of the material smoother and prevents it from sticking to metal or plastic chemical catalysts. This heavily cross-linked polymer has strong covalent bonds, with strong forces between the chains, and is therefore an insoluble and infusible, thermosetting polymer or thermoset.