Nice work on the boots who did you get the kit off of. Are they as hard as tyre rubber like they said?
If you decide to scrap that one or have some scrap about it would be interestimg to see what happens when in contact with oil / gas.
First out of the mold it's not as hard as a tire but after setting another day I'd say it's close. I got it off ebay I'm happy with the hardness and the stuff has some tinsel strength. The first one getting the cores out I had to use a pliers and I twisted the crap out of the stuff and only suffered a small little tear.
I fixed the little tear when I mixed and did another boot I dabbed a little on an now you can't find the tear.
I redid the mold to add a little collar around where the plug goes into the boot once I get it the way I want I'll create a mold to do 4 at a time.