Phil, those tapes looks pretty good, how well does that go with heat? Is that the same thing that hyundai use for wrapping around the electricals in our cars?
Having used all of these products in my trade, I found Amalgamated tape will peel off if you dont tape the end with insulation tape. Insulation tape doesn't work well if there is heat or water. The best method, and the only one I use under my hood, is to solder, and then protect the joint with Raychem glue lined heatshrink. You will never get water in the joint. You can by it at Middys / Auslec or any electrical wholesaler.
I also wouldn't recommend the splice connectors, even if you adhere to the conductor size recommendations, the ones you buy in super cheap auto...are just that, cheap crap. One incorrect join, especially on a circuit carrying a higher amperage can mean an electrical fire, which i have seen the result of that. At the very least, if you dont want to solder, use an
insulated crimp link .
Zoom!
