We've printed gaskets with RTV Silicone. We don't have a video, but I'll request one.

We are working on various fast-curing Silicones to speed the printing process - otherwise it's a slow print (waiting for each layer to set), or a sloppy print.

Our machines can print in just about any emulsifiable extrudable that is thick enough that it doesn't just run out of the tube and across the build platform. Essentially from the consistency of mayonnaise through precious metal clays. We have videos of our machines printing in clay, plasticine, plah-doh and sugru (rubber). The sugru is probably the closest consistency to RTV of anything we've filmed.

Anyway, the idea is to just print the mold, rather than printing a sample piece and then building a mold around it.