I have picked up the following RTV silicone samples in my travels: 2 sets of GE RTV 615A silicone and 615B curing agent, each approx. one pound; 2 sets of Dow Sylgard 184 RTV with curing agent, each one pound, and one set of Dow E-RTV silicone and curing agent, again about a one pound sample. If anyone would like to try making molds, these are free for the asking. Just let me know and I'll bring them on the 12th. These samples have been around a while and really are only good for trying out something new or for those who want to dive in for the first time.