Thanks for the heads up Andrew, I just started looking at heat proof wrappings. I'll check Techflex out.
One thing I have been using is this really nice cloth tape to wrap the loom. It's much more heat, abrasion and
oil resistant than the regular insulation tape. The loom stays flexible and it has a much nicer tactile feels. I've bought a couple of different ones to try but this is the best so far. It's a bit pricey at about $10 a roll plus postage but worth it.
tesa_51036 Automotive tape
Found it on eBay
Tesa 51036 19mm X 25M High Temp Adhesive Cloth Tape Cable Looms Wiring Harness | eBay
Cheers