As above, anyone used a good one that didn't go hard and flake to pieces within a week would be good.
The stuff from rally design is normally pretty good, but thats a general problem with heat wrap. I soaked mine in water before fitting it, and it lasted a bit longer.
Some people also then spray it with heat resistant paint, but that had mixed results.
The only sure fire way to eliminate heat is ceramic coating really.
There are two things no man will admit he cannot do well: drive and make love.
I use the thermotec wrap on mine with no problems. Bought a turbo wrapping kit for £130 you gets 2 types of wrap and a square metre of foil backed sheet too