They don't make gaskets for the case halves.....That is where you need to use the non hardening pliable stuff like yamabond, hondabond, 1104, permatex, gasgacinch......so many great gooy products out there to choose from that do not contain silicone which is what rtv is. Those other ones turn to gooey liquid when they get in the oil and just blend with the oil you'll see it when you drop the pan.....unlike the rubber hard silicone balls.